[All-in-one] List of all Open-Source Android Apps - Online Courses, Schools, and Other External Resour

Hi guys, this Thread is dedicated to the aspiring developers who'd be learning Android app development and like to have a look at the source code for already created (Final-Product) Android Apps in Play Store. Probably the List is not complete, and suggestions on other open source apps which is not included in this List is Welcome!
You may also want to check out F-Droid as it has its own repository of the open source Android apps, links to source codes, etc.
The F-Droid Repository is an easily-installable catalogue of FOSS (Free and Open Source Software) applications for the Android platform. The server contains the details of multiple versions of each application, and the Android client makes it easy to browse, install them onto your device, and keep track of updates.
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Fossdroid, a Marketplace for Open Source Apps → Featuring source links, bug trackers and compiled APK downloads, Fossdroid is a well executed manifestation of a directory of open source Android apps, in a clean and Google Play-esque interface inspired by Material Design, aimed at satisfying your source code requests across a wide category of apps.
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Click to collapse
[REPO] The library thread → Here is a list of several libraries put together, so you can use with your own apps for additional features.
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Click to collapse
Alphabetically arranged ... From ... A - C
A Better Camera - Almalence
All-purpose, full featured camera for Android
XDA Thread - [APP][4.0+] Open Camera and A Better Camera, open source camera apps
Source - Github
.
acDeskClock - Mod of Android DeskClock - By Achep
Source - Github
.
AcDisplay - By AChep
AcDisplay gives life to your device. Your device will let you know when a notification is received by showing you a beautiful, minimalist screen.
XDA Thread - [APP] AcDisplay
Source - Github
.
AC Stopwatch & Timer - By AChep
Source - Github
.
ActionsContentView Example - By Steven Rudenko
This application is an example for standalone library which implements actions/content swiping view.
Source - Github
.
Active Notify - By Akshay Chordiya
Active Notify gives you instant access to important notifications. No need to unlock your device to check time or notifications.
XDA Thread - Active Notify : Faster Notifications & Time
Source - Github
.
AdAway - By Dominik Schürmann [Play Store Link Dead]
AdAway is an open source ad blocker for Android using the hosts file. ROOT REQUIRED
XDA Thread - [APP] [UNOFFICIAL] AdAway v2.3
Source - Github
.
Adblock Plus - By Adblock Plus [Play Store Link Dead]
Adblock Plus blocks all annoying ads on your Android device. NO ROOT REQUIRED!
Source - Website
.
Addi - By Corbin Champion
A Computing Environment useful for solving many complex problems.
Source - Google Code
.
aeGis - By Decad3nce
aeGis is an OSS alternative to other security apps that interact via SMS.
XDA Thread - [APP] aeGis
Source - Github
.
aGrep - By Aquamarine Networks.
aGrep is a open-source text search program like a "grep".
Source - Github
.
Alarm Klock - By Craig G
A better alarm clock.
Source - Google Code
.
Amaze File Manager - By Vishal Nehra
Material Designed File Manager
XDA Thread - Amaze File Manager(Material theme)
Source - Github
.
AndEngine - Examples - By Nicolas Gramlich
AndEngine is a free Open Source 2D OpenGL Game Engine for the Android platform.
This application contains various Examples that showcase what developers can do with this engine.
Source - Github
.
Andlytics - By Andlytics Project
Andlytics collects statistics from the Google Play Developer Console.
XDA Thread - [OPENSOURCE APP] Andlytics (Play Store Stats App)
Source - Github
.
android-vnc-viewer - By androidVNC team + antlersoft
See and control your computer's desktop from your phone, from anywhere.
Source - Google Code
.
Android BlackBerry Unlocker - By ebraminio
Application for generating blackberry unlock code from android
Source - Github
.
Android Firewall - By jtschohl
A firewall on Android is a great tool when it comes to the tiered data plans carriers have moved to and that's not even talking about the added security a firewall brings.
Source - Github
.
Android Terminal Emulator - By Jack Palevich
Access your Android's built-in Linux command line shell. Unleash your inner geek!
Source - Github
.
Androminion - By Ankur Mehta
Play Dominion, the award winning strategy game, on your phone or tablet against brilliant AI's!
Source - Google Code
.
Androsens classic - By Christian Schneider
Androsens classic helps you to monitor all your device sensors! Gyroscope, light, acceleration, barometer and many more sensors can be displayed.
Source - Google Code
.
Androsens 2 - By Christian Schneider
Good things only get better, the long awaited sequel to Androsens has arrived. Androsens 2 displays all available sensor and GPS information. See all your device sensor in action.
Source - Google Code
.
Androzic - By Andrey Novikov
Navigation client that uses OziExplorer maps (ozf2, ozfx3). Great for hiking, geocaching, off-roading, sailing, boating and other outdoor activities.
Source - Github
.
And Bible - By Martin Denham
Bibles, Commentaries, Theological Dictionaries, Maps, and Christian books in over 50 languages
Source - Github
.
AnkiDroid Flashcards - By Nicolas Raoul
AnkiDroid lets you learn flashcards very efficiently by showing them just before you will forget. It is fully compatible with the spaced repetition software Anki (including synchronization)
Source - Github
.
AppAlarm Pro - By episode6
Launch any app or shortcut as an alarm clock!
Source - Github
.
APG - By Thialfihar
OpenPGP for Android. It's open source and its goal is to provide a similar OpenPGP implementation as GnuPG.
Source - Github
.
AppOps - By Sylvain Galand
This is a simple access to the new hidden "App Ops" feature in Android 4.3 and 4.4 (and not all of them) ! "App Ops" is a built-in application permissions manager.
Source - Github
.
AppOps | Independent App - By ssrij
Recompiled AppOps as an independent app from latest AOSP source.
Source - Github
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App Tracker By Nolan Lawson
Manage your apps the smart way! This handy 1x4 widget shows a list of 4 app icons
Source - Github
.
APRSdroid - By Georg Lukas
APRSdroid is an APRS application for Amateur Radio (HAM) operators. It allows reporting your position as well as sending and receiving messages.
Source - Github
.
AROMA Filemanager + TERMINAL - By amarullz
The World's First ANDROID Recovery Based Filemanager
Source - Github
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arXiv mobile - By Nonlinear Apps
arXiv mobile is science on your phone! Browse daily science articles (Physics, Astronomy, Math...) at arXiv.org and search the entire arXiv collection.
Source - Google Code
.
Auto Bright - By geekyouup
Simply enables / disables the displays Automatic Brightness setting. App and home screen widget.
Source - Google Code
.
Axel (XML Editor / Viewer) - By Xavier Gouchet
Axel is an Open Source simple XML editor and XML viewer, lightweight and ad-free.
Source - Github
.
Backgammon Mobile - ONLINE - By Alca Soc. Coop.
Are you a backgammon master? Are you simply a newbie? tired of weak AI or cheating rolls? Backgammon Mobile is the game you have to try!
Source - Github
.
Bankdroid - By Nullbyte
Bankdroid is an open source banking application for Swedish banks.
Source - Github
.
Banshee Remote - By Nikitas Stamatopoulos
Control Banshee on Linux using an Android powered device.
Source - Github
.
Battery Indicator - By Darshan Computing, LLC
Battery Indicator monitors and shows your battery charge level (percent) as an icon in your status bar, with temperature, health, voltage, and time since plugged / unplugged in the notification area.
Source - Google Code
.
Battery Widget - By geekyouup
Graphical Battery Widget shows the exact battery level in 1x1 space, with shortcuts to Power-Summary/Display/Network/GPS/Wifi/BT
Source - Google Code
.
Beats, Advanced Rhythm Game - By Keripo
Beats, Advanced Rhythm Game" is a music-based rhythm game for Google Android phones/devices.
Source - Google Code
.
Beebdroid (BBC Micro emulator) - By Little Fluffy Toys Ltd
The BBC Micro Emulator for Android
Source - Github
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BetterBatteryStats - By Sven Knispel
With BetterBatteryStats you can analyse the behavior of your phone, find applications causing the phone to drain battery while it is supposed to be asleep and measure the effect of corrective actions
XDA Thread - [APP][2.1+]BetterBatteryStats
Source - Github
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Better Wifi On/Off - By Sven Knispel
Better Wifi on/off aims at giving you the control of the Wifi state, optimizing your battery life without losing on user experience.
XDA Thread - [APP][2.1+]Better Wifi on/off
Source - Github
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Binaural beats therapy - beta - By Giorgio Regni
Binaural beats stimulates your brain by sending special auditory artifacts directly into your headphones to produce subtle changes in behavior though entraiment of brainwaves frequency.
Source - Github
.
Birthday Calendar Adapter - By Dominik Schürmann
Birthday Adapter provides birthdays, anniversaries, and other events from your contacts as a real calendar, which is displayed in your standard Android calendar application.
Source - Github
.
Blokish - By S. Coutant
Blokus is a family game involving four players and a board with 20 x 20 squares.
Source - Github
.
Boid for Twitter (OSP) - By Team Boid
Boid is the simple, beautiful Twitter client designed for Android 4.x (ICS and above). Boid is designed to be unique and fresh compared to other Twitter clients for Android.
Source - Github
.
Bookmark Folders - By DynamicG
Bookmark Folders lets you organize your browser bookmarks into folders.
Source - Google Code
.
Book Catalogue - By Evan Leybourn
An open source book cataloguing application (source on github). Books can be added manually, by ISBN, or barcode.
Source - Github
.
Book of Mormon Stories - By Gabriel Black
Animated stories of the Book of Mormon streamed from lds.org. This app is essentially a dedicated browser that allows you and your children to easily watch and listen to the Book of Mormon Scripture provided by the lds.org.
Source - Github
.
BoxOffice - By ARLab
BoxOfficeMatcher downloads the most popular movies and shows them into the movies list.
XDA Thread - [APP] BoxOffice, augmented reality open source app
Source - Github
.
Brightness Profiles - By Craig G
Easily adjust the device's brightness setting in one of the following ways
Source - Google Code
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build.prop Editor - By Nathan Campos
build.prop Editor was created to make your life as a Android geek a lot easier. If you have a rooted device this app will love to be able to let you easily edit the incredible build.prop file.
Source - Github
.
BusyBox - By Stephen (Stericson)
BusyBox is a software application that provides many standard Unix tools, much like the larger (but more capable) GNU Core Utilities.
Source - Google Code
.
Calculator - By Xlythe
The default CyanogenMod calculator! A calculator that tries to include graphing and matrix math without losing its simplicity.
Source - Github
.
Call Meter 3G - By Felix Bechstein
Call Meter lets you keep an eye on your mobile plans.
Source - Github
.
CamTimer - By Dozing Cat Software
CamTimer is a camera timer app designed to be as simple and efficient as possible.
Source - Github
.
CatLog - Logcat Reader! - By Nolan Lawson
Debug your apps. Find error stacktraces. See what your phone is saying about you behind your back. It's all there in the system log, aka logcat!
Source - Github
.
Catlog (Donate) - By Nolan Lawson
Donate version of Catlog
Source - Github
.
Chord Reader - By Nolan Lawson
Search the web for guitar chord charts to your favorite songs. Then, Chord Reader will automatically analyze the chords and allow you to transpose, add a capo, etc.
Source - Github
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Clip Stack - By little_cup
A tiny clipboard history manager app.
Source - Github
.
Color Clock - By BrianCo
Color Clock is a simple clock widget for your home screen or lock screen. Color Clock can be colored however you like it, including with transparency!
XDA Thread - [APP][4.2+] Color Clock
Source - Github
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Complete Linux Installer - By ZPwebsites
Complete Linux Installer is an all in one solution to installing Linux distros on your Android device. Brought to you by the LinuxonAndroid project the app is designed to allow you to install a full Linux distro without touching your Android install.
XDA Thread - Linux-on-Android project (Complete Linux Installer)
Source - Sourceforge
.
Congress - By Sunlight Foundation
Keep on top of Congress.
Source - Github
.
ConnectBot - By Kenny Root and Jeffrey Sharkey
ConnectBot is a powerful open-source Secure Shell (SSH) client. It can manage simultaneous SSH sessions, create secure tunnels, and copy/paste between other applications.
Source - Google Code
.
Core - By Andrey Moiseev
Touch the screen, rotate your device to gain health, kill enemies and protect the core as long as possible!
Source - Github
.
Countdown Notifier Pro - By Berry Mobile
Create countdown widgets to remind you of when special events are to take place.
Source - Github
.
Countdown Timer Widget - By Jonathan Dimond
A simple widget representing a countdown/kitchen timer. Click to start a new timer. Click again to update or cancel timer.
Source - Index
.
CPU Spy - By Brandon Valosek
This is a simple app to display the time the CPU spends in each frequency state. This can be a useful tool in diagnosing battery problems or tweaking your over-clock settings. It also displays the current kernel information.
XDA Thread - [APP][2.1+] CPU Spy v0.4.0 beta
Source - Github
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CPU Spy Plus - By Giuseppe Baglio
This is a simple app to display the time the CPU spends in each frequency state.
XDA Thread - [APP][2.1+][CPU Spy Plus] CpuSpy Plus by realgpp
Source - Bitbucket
.
CPU Spy Reborn - By Mirko Dimartino
This app is based on the famous CPU spy, is open source and still in development.
XDA Thread - [APP] [4.0.3] CPU Spy Reborn
Source - Github
.
CrossConnect Bible - By CrossConnect
THe free Open Source Android Bible!
Source - Google Code
.
Cryptonite - By CSH
This is a free and open-source file encryption solution based on the original EncFS code. Cryptonite is fully compatible with all EncFS features.
Source - Google Code
.
CurrentWidget - By RmDroider
CurrentWidget displays how much electric current the device is using from the battery or receiving from the charger.
Source - Google Code

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From ... D - K
Daily Money - By Dennis Chen
A simple & easy financial android application
Source - Google Code
.
Dalvik Explorer - By Elliott Hughes
Are you a developer wanting to know what Java system properties, environment variables, java.nio.charset.Charsets, java.util.Locales, or java.util.TimeZones are available to your app on a specific device? Run this app on the device in question to find out.
Source - Google Code
.
DashClock Widget - By Roman Nurik
DashClock is a replacement lock screen clock widget for Android 4.2+. It also exposes additional status items called extensions.
Source - Github
.
DashAnalytics for Dashclock - By Madhur Ahuja
DashAnalytics displays the metrics from your Google Analytics Website or Mobile App profile.
Source - Github
.
Dashclock Address Extension - By Mridang Agarwalla
Dashclock Address Extension is an extension for the Dashclock Widget that displays information about your device's network address.
Source - Github
.
Dashclock Betamax Extension - By Mridang Agarwalla
Dashclock Betamax Extension is an extension for the Dashclock Widget that displays information from Betamax providers about your account balance.
Source - Github
.
Dashclock Bluetooth Extension - By Mridang Agarwalla
Dashclock Bluetooth Extension is an extension for the Dashclock Widget that displays information about your bluetooth connections.
Source - Github
.
Dashclock Callstats Extension - By Mridang Agarwalla
Dashclock Callstats Extension is an extension for the Dashclock Widget that displays information about your phone's call statistics.
Source - Github
.
Dashclock Cellular Extension - By Mridang Agarwalla
Dashclock Cellular Extension is an extension for the Dashclock Widget that displays information about the current cellular network.
Source - Github
.
Dashclock Cyanight Extension - By Mridang Agarwalla
Dashclock Cyanight Extension is an extension for the Dashclock Widget that displays information about updates to your phone's Cyanogenmod nightly builds.
Source - Github
.
DashClock Gerrit Extension - By +1 Labs
Gerrit support for the dashclock widget. Monitor open changes in a gerrit code review system directly from your homescreen.
Source - Github
.
Dashclock Hangouts Extension - By Mridang Agarwalla
Dashclock Hangouts Extension is an extension for the Dashclock Widget that displays information about your new Hangouts messages.
Source - Github
.
Dashclock Hardware Extension - By Mridang Agarwalla
Dashclock Hardware Extension is an extension for the Dashclock Widget that displays information about your device's processor and memory usage.
Source - Github
.
DashClock Holidays - By João Orui
DashClock Holidays is an extension for DashClock Widget that displays the holiday for the current date.
Source - Github
.
Dashclock Hotspot Extension - By Mridang Agarwalla
Dashclock Hotspot Extension is an extension for the Dashclock Widget that displays information about your your wireless hotspot.
Source - Github
.
Dashclock Location Extension - By Mridang Agarwalla
Dashclock Location Extension is an extension for the Dashclock Widget that displays information about your device's current location.
Source - Github
.
Dashclock Messstats Extension - By Mridang Agarwalla
Dashclock Message Statistics Extension is an extension for the Dashclock Widget that displays information about your message statistics.
Source - Github
.
Dashclock NFC Extension - By Mridang Agarwalla
Dashclock NFC Extension is an extension for the Dashclock Widget that displays information about your near-field communication status.
Source - Github
.
Dashclock Ownership Extension - By Mridang Agarwalla
Dashclock Ownership Extension is an extension for the Dashclock Widget that displays information about the phone's owner.
Source - Github
.
Dashclock Processes Extension - By Mridang Agarwalla
Dashclock Processes Extension is an extension for the Dashclock Widget that displays information about about the running activities and processes.
Source - Github
.
Dashclock Profiles Extension - By Mridang Agarwalla
Dashclock Profiles Extension is an extension for the Dashclock Widget that displays information about the currently activated profile. It displays the profile name and the ringer state.
Source - Github
.
DashClock Reddit TIL Extension - By abhat
DashClock Reddit TIL(Today I Learned) extension is an extension for DashClock Widget. Displays top scored TIL from the reddit
Source - Github
.
Dashclock Storage Extension - By Mridang Agarwalla
Dashclock Storage Extension is an extension for the Dashclock Widget that displays information about the amount of available storage space on the device.
Source - Github
.
Dashclock Uptime Extension - By Mridang Agarwalla
Dashclock Uptime Extension is an extension for the Dashclock Widget that displays information about your device's uptime.
Source - Github
.
DashClock Weather (yr.no) - By Hans Petter Eide
This is an extension for use with the DashClock Android app. The extension is a clone of the Weather extension that comes included with DashClock, with the difference that this app pulls data from the Norwegian Metorological Institute (yr.no).
Source - Github
.
Dashclock Weeknum Extension - By Mridang Agarwalla
Dashclock Weeknum Extension is an extension for the Dashclock Widget that displays information about the current week.
Source - Github
.
Dashclock Whatsapp Extension - By Mridang Agarwalla
Dashclock Whatsapp Extension is an extension for the Dashclock Widget that displays information about your new Whatsapp messages.
Source - Github
.
Dashclock Wireless Extension - By Mridang Agarwalla
Dashclock Wireless Extension is an extension for the Dashclock Widget that displays information about the current wireless network.
Source - Github
.
Desk Clock - By Jay Kline
A very customizable, open-source, clock. Fills the screen, and very customizable.
Source - Github
.
Desk Pets - By Desk Pets International (HK) Limited
A universal controller app that works with the iDesk Pets Universal Remote to control Desk Pets
Source - Sourceforge
.
Devistats - By Christian Schneider
This is a statistics data visualizer for some selected german statistic data datasets.
Source - Google Code
.
Divide and Conquer! - By Karl Rosaen
Draw vertical and horizontal lines to partition the balls into smaller spaces. Once the balls are contained, you get to move on to the next level.
Source - Google Code
.
Domination (Risk Board Game) - By yura.net
Domination is a game that is a bit like the well known board game of Risk or RisiKo.
Source - Sourceforge (No Code)
.
Dots & Boxes - By Stefan Oltmann
The popular Dots & Boxes game from the 1970s.
Source - Google Code
.
DPI Changer - By Innodroid
This application allows you to view and change the DPI (pixel density of your LCD or LED display) of your phone.
Source - Bitbucket
.
droidplot - By Corbin Champion
gnuplot running on android.
Source - Github
.
droid VNC Server - By José Pereira
Allows you to remote control your android within your computer! Your device must be ROOTED!
Source - Github
.
DropBear SSH Server - By shk.schneider
This is a SSH server, based on DropBear.
Source - Github
.
DropBear SSH Server II - By shk.schneider
This is a SSH server, based on Dropbear.
Source - Github
.
Dutch TeleTEXT (teletekst) - By Atoom inc.
This is a lightweight super fast text based browser for the Dutch NOS Teletekst.
Source - Github
.
EBookDroid - PDF & DJVU Reader - By EM Dev
EBookDroid is an open source (GPL'ed) document viewer for Android based on the VuDroid code base.
Source - Google Code
.
Evernote Dashclock Extension - By Ty Smith
Evernote Dashclock Extension displays your Evernote reminders in the Dashclock Widget and provides one click access to view your reminders and note list.
Source - Github
.
Fake GPS Path - By RyanZa
Currently fake GPS apps just show a single fake location - no path or movement - useless!
Source - Github
.
FasterGPS - By Dominik Schürmann
With FasterGPS you can select a NTP Server matching your region to speed up the process of getting a GPS fix. ROOT REQUIRED
Source - Github
.
Fifteen Puzzle - By AChep
Source - Github
.
File Explorer - By Apposite Designs
Source - Google Code
.
File Manager Beta - By mick88
All New File Manager designed for ease of use and beautiful interface. It boasts the ability to bookmark folders, add file and folder shortcuts to homescreen, and takes advantage of Android KitKat's transparent bars.
Source - Github
.
File Quest - By DRAWNZER.ORG
File Quest is an xtreme app for managing your files and folders on your favourite Android Smart Phones.
XDA Thread - [Open Source] File Quest [Transparent File Manager - 4.0+]
Source - Github
.
Financisto - By Denis Solonenko
Open-source personal finance manager.
Source - Website
.
FireTaps - By IDKJava
A guitar hero/taptap like game based off of the open-source game, Frets on Fire and branched off of ToF
Source - Google Code
.
Flashlight by Joe - By jbutewicz
Open source Android flashlight app.
Source - Github
.
Floating Example - By EatHeat
Adds an icon on the screen which floats above all other screens. Can be dragged and moved around as wished.
XDA Thread - [APP] Floating Example
Source - Github
.
Floating Stickies - By Mohammad Adib
Floating Sticky notes that stay on top of all other apps! Easily dock them to the left side to keep your screen real-estate at full potential.
XDA Thread - [APP][2.1+] Floating Stickies
Source - Github
.
Focal (Beta) - By Team BBQ
Focal is a fully featured camera app looking to provide the most features on the most phones possible, including device-specific features on some devices. This app is the official release from the ex-CyanogenMod app.
XDA Thread - Focal - The Open Source Camera App
Source - Github
.
Fontster - By PriyeshPatel
Fontster allows you to easily change the system wide fonts on your Android device within a well designed Holo UI.
XDA Thread - Fontster - Open Source Holo Font Installer
Source - Github
.
Free42 - By Thomas Okken
Free42 is a re-implementation of the HP-42S calculator and the HP-82240 printer.
Source - Website
.
FreeHabr widget - By Andrey Moiseev
A widget for freehabr.ru
Source - Github
.
FreeMP3Droid - By Free Software
An open source,free,gratis,libre mp3 converter released under the LGPL.
Source - Google Code
.
FWeather Widget - By Frakbot
A weather widget based upon Tobias van Scheider's Authentic Weather concept design.
XDA Thread - [APP] [WIDGET] [OSS] FWeather widget - not your everyday weather widget
Source - Github
.
GCM4Public DEMO open source - By Vilius Kraujutis
Source - Links in Play Store
.
GemRB - By pelya
GemRB (Game engine made with pre-Rendered Background) is a portable open-source implementation of Bioware's Infinity Engine.
Source - Website
.
GeoLog - By Chainfire
GeoLog is a new kind of location tracker which changes tracking characteristics based on where you are and what you are doing.
XDA Thread - GeoLog
Source - Github
.
Gibberbot: Secure Messaging - By The Guardian Project
Gibberbot is a free, open-source SECURE chat client capable of firewall and filter circumvention, surveillance blocking and end-to-end encryption.
Source - Github
.
gist-it - By Jan Berkel
Gist is a simple way to share snippets and pastes with others.
Source - Github
.
Github - By Github
Create, manage, and discuss issues and stay up to date with an integrated news feed for all your organizations, friends, and repositories.
Source - Github
.
GlowPadSample - By Frakbot
The sample app for the GlowPadBackport library.
Source - Github
.
Google I/O 2013 - By Google Inc.
The official Google I/O 2013 conference companion app
Source - Google Code
.
GPS Share - By Ken Kinder
GPS Share lets you privately send a Google Maps link of your location to whomever you want, whenever you want, however you want.
Source - Website
.
Graph 89 - By Dritan Hashorva
Graph 89 - Emulator for the TI-89 graphing calculator.
Source - BitBucket
.
HackDash Hackerspace Dashclock - By Said Tahsin Dane
DashClock extension that shows the open/close status of your chosen hackerspace.
Source - Github
.
HaloShortcuts - By zst123
A shortcut selector to add a shortcut in floating mode on homescreen or for apps that uses shortcut selector.
Source - Github
.
Ham - By Smerty Software
Open Source Ham Radio App for Android. Solar / calculated band conditions, Maidenhead Grid Locator & Callsign lookups via QRZ.com XML subscription.
Source - Github
.
Happy Birthday - By EatHeat
A sample app created for Drag and Drop example.
Source - Github
.
HeadsUp - By Artem Chepurnoy
HeadsUp is a fork of AcDisplay mainly focused on displaying notifications while your device is on. It will inform you about new notifications.
XDA Thread - [APP][4.1+] HeadsUp
Source - Github
.
How to Say - By Andrey Moiseev
This is a pronunciation guide (talking dictionary). Enter a word ー and listen to its pronunciation!
Source - Github
.
iCal Import/Export - By Dr.Lue
Import Calenders over http and ftp, experimental, not supporting authentication.
Source - Google Code
.
Ice Cream Sandwich Calculator for Eclair - Gingerbread - By tombarr
Source - Github
.
iGranth Gurbani Search - By Richipal Singh
iGranth is a open source project, which allows Guru granth sahib text search and display of shabads. The text also called gurbani is displayed in Gurmukhi fonts.
Source - ?
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Imgur Mushroom - By tateisu
Small and powerful image uploader for Imgur image sharing service.
Source - Github
.
Intent Intercept - By Intrications
This app attempts to intercept as many intents as possible in order to examine their contents.
Source - Github
.
I/O 2014 DashClock Extension - By NPike
A simple DashClock extension that shows a countdown to the registration for Google I/O 2014.
Source - Github
.
Japanese Name Converter - By Nolan Lawson
Converts any name from English into Japanese characters.
Source - Github
.
Jelly Clock Widget - By AChep
Jelly Bean 4.2 analog clock, with future ability to customize
Source - Github
.
Jota Text Editor - By Aquamarine Networks.
Jota is a text editor designed for a long text file. It's pronouced as "i-o-ta".
Source - Google Code
.
JW Droid - By JW Droid
Powerful service organizer for Jehovah's Witnesses.
Source - Google Code
.
K-9 Mail - By K-9 Dog Walkers
K-9 Mail is an open-source e-mail client with search, IMAP push email, multi-folder sync, flagging, filing, signatures, bcc-self, PGP, mail on SD & more!
Source - Github
.
KeepScore - By Nolan Lawson
KeepScore is a free and open-source score keeper that can be used with any points-based game, from cribbage to Carcassonne.
Source - Github
.
Keyboard from Android 2.3 - By Steven Lin
Default Android 2.3 Keyboard with added features.
Source - Github
.
Keyboard Manager (root users) - By ne0fhyk
Keyboard Manager allows you to customize what keyboard appears based on your device configuration.
Source - Bitbucket

---

From ... L - Q
LAIA: Learn Android in Android - By SferaDev
LAIA is an Android app that teaches you the basics of Android development in the palm of your hand (or tablet).
XDA Thread - [APP][2.2+] Learn Android in Android
Source - Github
.
Last.fm - By Last.fm Ltd.
Learn about your favorite artists, find nearby events, and share your music tastes with the Last.fm scrobbler.
Source - Github
.
Lightning Browser - By A.C.R. Development
Enjoy Lightning Browser, one of the smallest browsers around. It is a high-performance small-sized browser built for those who don't want the cumbersome slowness or size of Firefox or Chrome.
Source - Github
.
Linphone Video - By Belledonne communications
Linphone is an open source internet phone or Voice Over IP phone (VoIP), compatible with the SIP protocol.
Source - Website
.
[App] [4.2] Lock Screen Notifications Widget - By Roymam
Widget that displays notifications on lockscreen using Android 4.2 lock screen widget mechanism.
Source - Google Code
.
Log Collector - By Xtralogic, Inc.
Collects a device log and sends it to a developer using a method (email, messaging, etc.) of your choice.
Source - Google Code
.
LOIC - Low Orbit Ion Cannon - By Mohammad Adib
An unofficial port of the Low Orbit Ion Cannon (LOIC) software used for flooding packets; Now on mobile! Simply lock on to a target, specify the numerous attack options and the desired settings, and FIRE!
Source - Github
.
Lolcat Builder - By David Brown
Simple Lolcat builder application.
Source - Google Code
.
LOLCODE Interpreter/Editor - By Linxdroid Team
This is a port of a Java LOLCode Interpreter. Edit and LOLCode on your android device!
XDA Thread - [APP][2.2+] LOLCODE Interpreter
Source - Github - App | Github - Interpreter
.
MAME4droid Reloaded (0.139) - By Seleuco
MAME4droid Reloaded emulates arcade games supported by original MAME 0.139.
Source - Google Code
.
Mangler - By mangler.org
Mangler is an open source VOIP client capable of connecting to Ventrilo 3.x servers.
Source - Github
.
Maršrutai.lt - By Maršrutai.lt
Lithuanian public transport app from marsrutai.lt
Source - Google Code
.
Mathdroid - By Elliott Hughes
Algebraic entry. Full on-screen history (multi-line display). Use your phone's keyboard or on-screen buttons. Usual functions: trig, log, etc. Parentheses. Copy to clipboard. Open source.
Source - Google Code
.
Maths Man - More than a calculator - By UpGado
Have you ever wanted help in maths? Need an app which does work and saves time? It's Maths Man!
Source - Github
.
Matrix Calculator - By karpatil
This is a simple, OPEN SOURCE and FREE matrix calculator.
Source - Website
.
Mirrored - By Holger Macht
Application for reading Spiegel Online. It is a front end for reading the articles in an easy and comfortable way without starting a browser.
Source - Website
.
mixare - By mixare Team
mixare Augmented Reality Engine is an augmented reality browser, which is free and open source
Source - Github
.
Mizuu - By MizDev
Mizuu is a user friendly media center application for Android tablets and smartphones.
Source - Github
.
Mockey, quotes of your friends - By fraben
Mock a friend, a colleague, anyone! Mockey lets you record quotes from the person you want to mock, using text or recording audio.
Source - Github
.
MonTransit (STM, Bixi) - By Mathieu Méa
MonTransit brings STM buses and subways and Bixi bikes information in your pocket.
Source - Google Code
.
Mounts2SD - Storage & Memory - By SpazeDog
Mounts2SD is a customizable sd-ext control script that can be used to move content to and from the second sdcard partition known in Android as sd-ext.
XDA Thread - [APP][2.2+] Mounts2SD - Storage & Memory Management
Source - Github
.
MTG Familiar - By gelakinetic
MTG Familiar is a powerful utility app for Magic: The Gathering.
Source - Google Code
.
MTG Judge - By Alexei Gousev
MTGJudge is the only reference application you're going to need while judging Magic events.
Source - Github
.
Muzei Live Wallpaper - By Roman Nurik
Muzei is a live wallpaper that gently refreshes your home screen each day with famous works of art. It also recedes into the background, blurring and dimming artwork to keep your icons and widgets in the spotlight.
Source - Github
.
My App List - By ProjectsException
With 'My App List' you can save installed applications in a list to restore them after flash or install a new ROM.
XDA Thread - [APP][2.1+] My App List
Source - Github
.
My Expenses - By Michael Totschnig
My Expenses is designed to keep track of expenses, and to export these expenses as QIF files into a finance program (e.g.: Grisbi, GnuCash).
Source - Github
.
mythmote - By TKj
MythMote is an open source android application that controls MythTV frontends.
Source - Google Code
.
Network Tester - By Guillaume Cottenceau
Network Tester quickly validates you're connected to the real web (by downloading a very small dedicated file and checking its content).
Source - Google Code
.
Newton's Cradle - By geekyouup
Newton's Cradle model. Nice UI, drag and drop the balls to create motion or use accelerometer.
Source - Google Code
.
Nimbus - By Corbin Davenport
Nimbus is a simple and powerful weather app, available for Chrome, Firefox, Android, and as a web app.
Source - Github
.
nitrality - By sulph8
Full-featured tool to control your phone. An open source, full-featured tool to combine all other tools used for managing your SGS1/2.
XDA Thread - nitrality - Full-featured tool to control your phone.
Source - Website (Not Working)
.
NO-frills CPU Control - By SINÉO
No-frills CPU Control is a tool you can use on your rooted [1] device to quickly set the CPU frequencies and governor to use.
XDA Thread - "NoFrills" CPU Control: configure cpu frequencies & governor
Source - Github
.
NoNonsense Notes - By NoNonsenseApps
An open source notepad and to do app with both phone and tablet UIs.
Source - Github
.
Notable: Quick Reminder - By Yu Chen Hou
Notable allows you to create notification reminders on the go. Need to remind yourself of something to do? Just open the app, type in a short message, and create the note! It's that easy!
Source - Github
.
NoteCipher - By The Guardian Project
This is a simple open-source notepad app which demonstrates the capability of the SQLCipher for Android encrypted database library.
Source - Github
.
Notify Me! - By TpmKranz
Notify Me! is simple in design: You add apps of which the notifications should be displayed on the lock screen to a list, specify the behavior of those notifications on the way and wait for a notification - it will be displayed as a popup in front of your lock screen.
XDA Thread - [APP; 2.1+] Notify Me! (notifications on the lock screen)
Source - Google Code
.
NS2 News - By Christian Schneider
This is a little help for fans to stay up to date and well informed about the propably most brilliant game: natural selection 2.
Source - Google Code
.
NSTools - By cyanN.mobi
With NSTools you can easily manage these tweaks:- BLD, BLN, BLX, CPU Governor, Custom Voltage, etc.
XDA Thread - NSTools v1.16 for managing various Ezekeel's MOD and tweaks
Source - Github
.
NTPSync - Time Synchronization - By Dominik Schürmann
NTPSync is a simple NTP time synchronization app for Android
Source - Github
.
OCR Test - By Robert Theis
Experimental app for optical character recognition (OCR).
Source - Github
.
Octave - By Corbin Champion
This is Octave for android. Free, open source numerical computing goodness.
Source - Github
.
OctoDroid - By Azwan Adli
This application provides access to github.com information and stay connected with your networks.
XDA Thread - Gh4a - Github Client for Android
Source - Github
.
Offline Browser - By Nolan Lawson
The default Android browser currently can't read HTML files from the SD card. I needed an app that could, so I wrote this one.
Source - Github
.
Offline Calendar - By Dominik Schürmann
Lets you add calendars to the Calendar app, which are not synchronized and are accessible only on the device itself.
Source - Github
.
OI About - By OpenIntents
OI About is a standalone about dialog that is shared between apps. This application is invoked through the menu of other OI applications.
Source - Github
.
OI Convert CSV - By OpenIntents
Extension for OI Shopping List and OI Notepad: Import/Export of notes in Palm CSV format, and shopping lists in Outlook task or HandyShopper .CSV format to SD card.
Source - Github
.
OI Countdown - By OpenIntents
The OpenIntents Countdown notifies you after a specified amount of time.
Source - Github
.
OI File Manager - By OpenIntents
OI File Manager allows you to browse your SD card, create directories, rename, copy, move, and delete files.
Source - Github
.
OI Flashlight - By OpenIntents
OI Flashlight is a simple and effective application that helps you find a way in the dark.
Source - Github
.
OI Notepad - By OpenIntents
OI Notepad is a full-featured open source note taking application.
Source - Github
.
OI Safe - By OpenIntents
OI Safe safely protects all of your passwords and other private data using industry standard AES encryption.
Source - Github
.
OI Shopping list - By OpenIntents
OI Shopping List is a powerful application which makes it easy to create and manage checklists.
Source - Github
.
OI WebIntents Agent (beta) - By OpenIntents
Web Intents / Web Activities are a concept where web apps can delegate tasks, like sharing or selecting an image, to 3rd parties apps.
Source - Github
.
Omni Notes - By Federico Iosue
Note taking open-source application aimed to have both a lightweight footprint on system performances and simple interface but keeping smart behavior.
XDA Thread - [APP][2.3+] Omni Notes - Easy note taking
Source - Github
.
OpenDocument Reader - By Thomas Taschauer
OpenDocument Reader, formerly known as OpenOffice Document Reader, allows you to read your ODF documents wherever you are.
Source - Github
.
OpenMBTA - By Kaja Software
OpenMBTA is a free open source mobile app which provides transit schedule information for the Boston MBTA metro system.
Source - Github
.
OpenSudoku - By Roman Mašek
OpenSudoku is an open source sudoku game.
Source - Github
.
OpenTTD - By pelya
Open source business simulation game based upon Transport Tycoon Deluxe.
Source - Website
.
OpenVPN Installer - By Friedrich Schäuffelhut
You need a root device the tun/tap driver and busybox. OpenVPN Installer will try to install openvpn (2.1.1) in /system/xbin or /system/bin.
Source - Google Code
.
OpenVPN Settings - By Friedrich Schäuffelhut
You need root, busybox, tun.ko and the openvpn binary!
Features: UI similar to Wi-Fi settings; Restart tunnel when connectivity changes (e.g. from wifi to 3g); Start on boot; Passphrase; DNS; Script-Security; Write and View Log File; Open Source (GPLv3);
Source - Google Code
.
Open Android SVN (OASVN) - By Valley Technologies Group
The first functional SVN (Subversion) client for Android that correctly uses the SVN protocol!
Source - Website
.
Open Explorer Beta - By brandroid.org
Open Explorer - an open source file manager for all Android devices! (Tablets, Phones, Google TV)
Source - Github
.
Open GPS Tracker - By René de Groot
An application that can track your travels of your Android by storing your GPS locations.
Source - Google Code
.
Open Manager (File Manager) - By Nexes Dev
This is a free and open source file manager for Android supporting Android version 1.6 and above.
Source - Github
.
Open Manager for Tablets - By Nexes Dev
Fast and lightweight file manager for Honeycomb tablets. Designed to be stable, fast and give you the power over your files and folders.
Source - Github
.
Open Source SMS Forwarder - By Alex Daloo
A simple SMS (to Email/Website) forwarder app.
Source - Website
.
OsciPrime Oscilloscope Legacy - By Nexus-Computing
This is the Open Source Oscilloscope based on the Bachelor Thesis "Using Android in Industrial Automation" of the University of Applied Sciences of Northwestern Switzerland.
Source - Website
.
OsmAnd - By Anvisics
OsmAnd (OSM Automated Navigation Directions) is an open source navigation application with access to a wide variety of global OpenStreetMap (OSM) data.
Source - Google Code
.
OTA RootKeeper - By supercurio - Project Voodoo
Free tool trying to protect root across manufacturer's OTA updates.
Source - Github
.
ownCloud - By ownCloud, Inc.
Welcome to the ownCloud Android App – Add an ownCloud server, and have your private file sync and share cloud up and running in no time.
Source - Github
.
Oyster Mate - By Andy Botting
Oyster Mate is an Android application for viewing your OysterCard balance, auto top-up value and travel cards or season tickets.
Source - Github
.
PageTurner Reader - By NightWhistler
PageTurner is an open-source reader for ePub files that allows you to synchronize your reading progress across devices.
Source - Github
.
Panoramio - By Mike Cleron
Finds pictures of interesting places in your area. Use a map or radar to guide you to them.
Source - Google Code
.
Pedometer - By Levente Bagi
Counts your steps, displays your pace, approx. distance, speed and calories burned.
Source - Github
.
PerApp - By Omega Centauri Software
PerApp lets you customize your device with per-application individualized settings.
XDA Thread - PerApp -- change a few per-app settings
Source - Google Code
.
Performance Control - By h0rn3t
Performance Control is A CPU Control application bundled with AOKP (created by xoomdev).
Source - Github
.
Permission Explorer - By Criniti Carlo
Permission explorer shows to you how your installed applications can access to your system
Source - Google Code
.
Persian Calendar - By Ebrahim Byagowi
Free and OpenSource Persian Calendar
Source - Github
.
Photostream - By Romain Guy
Photostream is a photo browser for the popular Flickr website.
Source - Google Code
.
PinDroid - By Matt Schmidt
A client app for the Pinboard bookmarking service.
XDA Thread - PinDroid - Pinboard Bookmarks for Android
Source - Github | Google Code
.
Piwik Mobile - By Piwik
Piwik is a downloadable, open source (GPL licensed) real time web analytics software program.
Source - Website
.
Pixelesque - Pixel Art - By RM Mobile
Pixelesque is the best pixel art creator for Android! Using the super-easy to use interface, draw, erase, zoom, and drag to create beautiful works of Pixel Art, and share it with others!
XDA Thread - Pixelesque - Pixel Art Creator
Source - Github
.
Plaphoons for Android - Beta - By OpenIntents
Plaphoons for Android helps users with speech disability to communicate through their Android tablet device (even though it runs on any device).
Source - Github
.
PocketTool - By Sn0wB0und
Personalize your Minecraft Pocket Edition experience with PocketTool. Features include: install user-made skins, texture packs, and mods.
Source - Github
.
pressureNET - By Cumulonimbus
pressureNET is a global network of user-contributed atmospheric pressure readings.
XDA Thread - pressureNET 2.1 is released: open source Android barometer network
Source - Github
.
ProxyDroid - By Max Lv
ProxyDroid is an app that can help you to set the proxy (http / socks4 / socks5) on your android devices. PLEASE ROOT YOUR DEVICES FIRST.
Source - Google Code
.
pyLoad - By RaNaN
This is the official Android client for the **pyLoad** Download Manager. You need to have pyLoad running on your pc or server.
Source - Bitbucket
.
Quota - By SouthFreo Software
Monitors you local cell/wifi usage, Setup alerts to notify you when over ideal or % usage, Monitors multiple ISP/Mobile/Travel/Tolls ...
Source - Github

---

From ... R - Z
Radar - By Mike Cleron
Invoke this activity from your app to display a radar view. This will draw a bearing between the user's current location and the specified latitude and longitude.
Source - Google Code
.
Random RGB Live Wallpaper - By luzi82
A live wallpaper to generate random color pixel on screen.
Source - Github
.
RateBeer for Android - By 2312 development
Mobile interface to the world's largest source for information on craft beer: RateBeer
Source - Google Code
.
Reddit Headlines for DashClock - By Trolldad
Reddit Headlines for DashClock will display top stories from the subreddit of your preference on your DashClock widget or daydream.
Source - Github
.
RedPhone Beta - By Thoughtcrime Labs
RedPhone provides end-to-end encryption for your calls, securing your conversations so that nobody can listen in.
Source - Github
.
Root Verifier - By Madhav Kanbur
This application is a simple app which checks if your Android device has Superuser access ("root") or not.
XDA Thread - [Android 2.2+]Root Verifier[Checks Root & Busybox]
Source - Github
.
RoundR - By Mohammad Adib
RoundR serves a simple purpose; To round the corners of your screen.
XDA Thread - [APP][2.1+] RoundR - Rounded screen corners
Source - Github
.
Rotation Lock Open Source - By Peng Huang
Turn on/off Auto-rotate screen quickly by long pressing search button.
Source - Github
.
SambaDroid - By Berserker
SambaDroid is a native port for Android of the popular Samba for Linux. ROOT REQUIRED
XDA Thread - [APP][2.2+]SambaDroid
Source - Github
.
Sanity - By Cristiano Tagliamonte
Sanity makes your phone calls better, easier and healthy.
Source - Github
.
Search based launcher v2 - By Ideas from brain
Effective & simple & open source with minimalistic appearance.
XDA Thread - [app 2.1+] Search based launcher - open source
Source - Github
.
Secrecy -Encrypt Files - By Doplgangr
Secrecy helps you encrypts your important private files. We only have one mission statement: delivering privacy at the touch.
XDA Thread - [App][2.3+][OPEN SOURCE] Secrecy - encrypt your files
Source - Github
.
Send To Car - By Julien Vanier
This app lets you send an address from Google Maps directly to the navigation system of your vehicle so you don't have to manually type it in.
Source - Sourceforge
.
Send With FTP - By Michael Totschnig
Send With FTP responds to two intents for sharing files through FTP: 1) android.intent.action.SEND 2) android.intent.action.SENDTO
Source - Github
.
Seven+ WP7 Calculator - By Thomas Barrasso
nspired by the beauty and simplicity of the Metro User Interface/ Microsoft Windows Phone 7 (WP7), The Seven+ WP7 Calculator offers an easy to use, effective alternative to the default Android calculator application.
XDA Thread - The Seven+ Calculator
Source - Github
.
Share By QRCode - By Intrications
Share web addresses by QRCode from the Browser or YouTube app.
Source - Google Code
.
Shelves - By Garen J Torikian
Shelves is an Android application that manages your collection of apparel, board games, books, comics, gadgets, movies, music, software, tools, toys, and video games.
Source - Github
.
Shoppinglist (Open Source) - By Lennart Prelle
Shoppinglist is an open source app on Android to store all your items you wan't to buy.
Source - Github
.
SidePanel - By 한영빈
Swipe From Edge! and easily switch between running tasks.
XDA Thread - [APP][2.2+][BETA]SidePanel - Swipe from Edge to multitask
Source - Github
.
Simon Tatham's Puzzles - By Chris Boyle
Collection of 34 one-player open-source multi-OS puzzle games.
Source - Website
.
Simple C25K - By Roel Blaauwgeers
Simple C25K is a very simple, free and open source application that can be used to follow Josh Clark's famous 'Couch to 5k' running plan.
Source - Github
.
Simple Explorer - By DF1E
File Manager designed in Holo Style.
Source - Github
.
Simple Loan Calculator - By Andrei Samkov
The Simple calculator for annuity, differentiated and fixed payments.
Source - Google Code
.
SKU Kernel [Any Root Device] - By Lounge Katt
StarKissed Universal Kernel Remote was developed to offer a single universal platform to configure kernels without charging the price of a pack of cigarettes.
Source? - XDA Thread
.
SlidingMenu Demos - By Jeremy Feinstein
SlidingMenu is an Open Source Android library that allows developers to easily create applications with sliding menus like those made popular in the Google+, YouTube, and Facebook apps.
Source - Github
.
SLW App History Widget - By Christian Schneider
A (s)imple, (l)ight(w)eight app history widget, that displays the recently used apps in a widget.
Source - Google Code
.
SLW Audio Volume Widget - By Christian Schneider
A (s)imple, (l)ight(w)eight audio volume widget. It lets you set the volume of different audio streams with just a widget.
Source - Google Code
.
SLW Battery Widget - By Christian Schneider
The widget displays battery level in percent. No ads. No permissions.
Source - Google Code
.
SLW Cache Cleaner Widget - By Christian Schneider
It helps you to clear all application cache files with only one touch on the widget.
Source - Google Code
.
SLW Cpu Widget - By Christian Schneider
A (s)imple, (l)ight(w)eight cpu widget, that displays cpu load without the need of any permission. No ads.
Source - Google Code
.
SLW Gps Widget - By Christian Schneider
A (s)imple, (l)ight(w)eight gps widget. It shows Latitude, altitude(as soon there is a GPS fix available) and Longitude in the top line.
Source - Google Code
.
SLW Storage Widget - By Christian Schneider
A (s)imple, (l)ight(w)eight, storage widget. It displays free storage space available on SD card on the left and free internal memory on the right.
Source - Google Code
.
SLW Traffic Meter Widget - By Christian Schneider
A (s)imple, (l)ightweight, network traffic counter widget. It displays network traffic without the need of any permission. No ads.
Source - Google Code
.
SLW Wifi Scan Widget - By Christian Schneider
A (s)imple, (l)ight(w)eight, wlan / wifi scanner widget. It displays the wlan / wifi networks in your neighborhood.
Source - Google Code
.
Solar Collector (Sky Map) - By Paradise Android
In "Solar Collector" you need to harvest solar energy with your phone.
Source - Google Code
.
SongMemo - By JoaoSantacruz
SongMemo is a multitrack audio recorder (4 track like) for the Android platform.
Source - Github
.
Spark 360 - By Akop Karapetyan
Spark 360 is a full-featured, unofficial Xbox Live and PlayStation Network client for Android devices.
Source - Google Code
.
Sparse rss - By Stefan Handschuh
A very simple open source (MIT license) RSS reader.
Source - Google Code
.
Spy Camera OS (Open Source) - By Jimmy Halim
Everyone at one time will want to capture image without anyone notice it, this application will give you an easy, fast and smart way doing it.
XDA Thread - Spy Camera OS (Open Source)
Source - Bitbucket
.
S Tools+ - By Naman14
S Tools+ is a pack of 5 different useful tools for your device.
XDA Thread - [App][Material Design] [Open Source]S Tools+
Source - Github
.
Superuser - By ClockworkMod
Grant and manage Superuser rights for your phone.
Source - Github
.
SwiP - ProfileSwitcher - By FortyTwoBits
SwiP - Switch profiles intelligently. SwiP is an intelligent profile app for Android.
XDA Thread - [APP][4.0+] SwiP - Switch profiles intelligently
Source - BitBucket
.
Target Live Wallpaper - By PuZZleDucK Industries.
Simple touch tracking live wallpaper. Tracks touch gestures and renders a targets, many options
XDA Thread - [App] Target Live Wallpaper Open Source
Source - Google Code
.
Tea Timer - By Ralph Gootee
A simple tea timer, works when the phone is sleeping. Can even be used to time things _other_ than tea!
Source - Github
.
Ted (Text Editor) - By Xavier Gouchet
Ted is an Open Source, Ad-free, lightweight text editor, meant as a Notepad application, and not meant to edit big files.
Source - Github
.
Telegram - By Telegram LLC
Telegram is a messaging app with a focus on speed and security. It’s superfast, simple and free.
XDA Thread - [APP][2.1+] Telegram, the secure chat client
Source - Website
.
TextSecure Beta - By Thoughtcrime Labs
TextSecure is a security enhanced text messaging application that serves as a full replacement for the default text messaging application.
Source - Github
.
Timer - By Sarasini Francesco
Open Source Stopwatch Application.
Source - Website
.
Timetable - School Scheduler - By Ravrahn
Timetable is an easy way of keeping track of your high school or college classes. It does one simple thing - stores a high school timetable and displays it.
XDA Thread - [APP][1.6+]Timetable
Source - Bitbucket
.
Tiny File Commander - By Christian Schneider
Tiny File Commander is a very small (130Kb), very fast ad free file manager with beautiful icons.
Source - Google Code
.
Tiny Open Source Violin - By Martyn Haigh
Currently has a choice of 3 classic songs (louder by popular request), or you can now also pick your own song!!
Source - Github
.
Tippy Tipper (Tip Calculator) - By Mandaria Software
A simple and open source Tip Calculator.
Source - Google Code
.
toggleheadset2 - By ddubtech.com
This is an open source project originally intended for use with the now legacy Android 1.6 (donut) release and 3.5mm headphone jack HTC multi adapters on the G1 due to android issue 2534.
Source - Google Code
.
Tomdroid notes - By Olivier Bilodeau
A Tomboy client for Android. Tomboy is a desktop note-taking app using a wikiwiki approach and a simple user interface.
Source - Launchpad
.
Torch - By Colin McDonough
Torch is an open source utility which uses your phones LED camera flash as an LED flashlight.
Source - Google Code
.
Torch LED Flashlight - By Colin McDonough
Torch is an open source utility which uses your device's LED camera flash as an LED flashlight.
Source - Google Code
.
Tram Hunter - By Andy Botting
Android client to Yarra Trams tram TRACKER® service for real-time location of Melbourne trams, Open Source under the GPLv3 license.
Source - Github
.
ttTumblr - By Fredrik Leijon
Tumblr application, supports viewing dashboard, posting images, text, link, conversation and quote entries.
Source - Github
.
Twidere for Twitter - By mariotaku
Twidere is a powerful Twitter and Identi.ca (Use basic auth) client for Android 1.6+, which gives you a full Holo theme and much more.
Source - Github
.
Twidere Imgur Uploader - By mariotaku
Twidere Imgur Uploader
Source - Github
.
Ultimate Stopwatch & Timer - By geekyouup
Beautifully designed Stopwatch and Countdown timer for Android phones, tablets and TVs. Ticking Sound, Countdown Alarm and Lap Time functionality
Source - Google Code
.
Ultra Explorer - By kshark27
Opensource Explorer for Android
Source - Github
.
User Management - By Appaholics
User Management provides a nice GUI frontend to use the limited multi user support added in Android 4.1 Jellybean
Source - Github
.
vCardIO - By Duck Tayp
vCardIO is an open-source utility to import/export contacts from/to a vCard (vcf) file on the SD card.
Source - Google Code
.
Veloid - By xirgonium
Application for bike sharing users
Source - Google Code
.
Ventriloid - By jtxdriggers
Ventriloid is an open source Ventrilo 3.x client with a familiar UI. Ventriloid is based on the Ventrilo library for Linux created by the developers of Mangler.
Source - Google Code
.
Vibe Vault - By Andrew Pearson and Sanders DeNardi
Vibe Vault is the best way to stream and download FREE live music from your phone.
Source - Website
.
Vim Touch - By momodalo
VimTouch is a open source VIM port on Android. It supports full vim syntax and finger touch gestures to help VIM much more usable on touch screens.
Source - Github
.
VLC for Android Beta - By VideoLabs
VLC media player is a free and open source cross-platform multimedia player that plays most multimedia files as well as discs, devices, and network streaming protocols.
Source - Website
.
WebSMS - By Felix Bechstein
WebSMS lets you send free and very cheap TXT/SMS via different webservices.
Source - Google Code
.
Weight Chart - By fredrik.jemla.eu
Keep a log of your body weight and display on a chart.
Source - Website
.
Widgets Everywhere - By sak-venom1997
Keeping widgets just in your home screen sort of adds a limit to there functionality.With this app, you can put an end to the limit.
Source - Github
.
Wifi Connecter Library - By farproc
An OPEN SOURCE library which allows you to connect to Wi-Fi hotspots.
Source - Google Code
.
Wifi Fixer - By Zanshin-g1
Wifi Fixer is a low-resource service that works around several problems with Android wifi. It is primarily intended for users whose wifi shows as connected, but cannot use internet applications.
Source - Github
.
WifiSync - By Michael Kanis
WifiSync automatically enables/disables the Auto-sync setting of your phone when WLAN gets connected/disconnected.
Source - Github
.
Wikipedia - By Wikimedia Foundation
Official Wikipedia App for Android.
Source - Github
.
Wiktionary - By Wikimedia Foundation
Wiktionary is a web-based dictionary that anyone can edit, available in over 150 languages.
Source - Github
.
World Map - By sigseg, llc
WorldMap is a simple Android app that displays a map of the world taken from Wikimedia, and allows the user to scroll around on it.
Source - Github
.
Wunder - By Smerty Software
This is NOT a general weather app, it is an open source app to view current weather from personal weather stations on Weather Underground.
Source - Github
.
Yaaic - By Sebastian Kaspari
Yaaic (Yet Another Android IRC Client) is an Internet Relay Chat (IRC) client.
Source - Github
.
Yet Another Auto Brightness - By Gyrus Solutions
A small application designed to enhance user control over screen brightness. Initially it was developed to make the screen as dim as possible to save battery.
XDA Thread - [APP][2.2+][FREE] Yet Another Auto Brightness
Source - Bitbucket
.
YouTube Downloader - By xda_dentex
Simply select the sharing button in the YouTube App while watching a video (or share any YouTube plain text link via any App; i.e. browser) and choose "YouTube downloader"
Source - Github | Sourceforge
.
ZooBorns - By Smerty Software
Open Source client to view photos from ZooBorns.com
Source - Github
.
2cloud - By Second Bit
The 2cloud Project's Android client. Sends links from your Android phone to your browser instantly.
Source - Github

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Miscellaneous - Open Source Scripts / Tools / Frameworks etc.
ChkBugReport - By Sony Mobile
ChkBugReport is a tool for analysing the output of an Android™ bugreport. The tool takes the large text file, which is the output of the Android bugreport tool, and parses it into something much more readable.
XDA Thread - [TOOL] [PROJECT] New bugreport analysis tool - open source project by Sony Ericsson
Source - Github
.
Online Nandroid / Nandroid Backup without re-booting [CWM + TWRP + 4EXT] - By ameer1234567890
Nandroid backups are usually performed in recovery mode. This means you would have to turn off your phone and reboot in recovery mode, which wastes a whole lot of time rebooting and a lot more time offline. So, I set to develop an online nandroid backup tool, namely Online Nandroid, which can do nandroid backups without switching off my phone.
Source - Github
.
Xposed Framework - By rovo89
A framework which gives you the possibility to modify your ROM - without modifying any APK (developers) or flashing (users)!
Source - Github - Xposed | XposedBridge | XposedInstaller
This List of all Open-Source app thread featured in Portal. Thanks to News Writer, Mike Szczys.
Also, Thanks to all members who have contributed to this Thread by providing missing open source app's links.

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Nice research,
Ty
----------------Read If You Have Time----------------
Send From My Samsung Galaxy Note 2 N7100,
HIT thanks if I did Helped you.
LIFE! It's what you make out of it!

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收件人： [All-in-one] List of all Open-Source Android Apps
thx for the link to so much code
Sent from my HTC X515d using xda premium

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Thank you so much
All these people who say thank you and don't hit the thank you button...
As an aspiring developer I am looking for ways to improve my work. :highfive:

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F-Droid is a good source for open-source apps, along with links to source code. Many of the ad blocking apps recently kicked off the Play Store are now on F-Droid. They also have their own F-Droid app that can notify you of updates. Very handy!

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jb789 said:
F-Droid is a good source for open-source apps, along with links to source code. Many of the ad blocking apps recently kicked off the Play Store are now on F-Droid. They also have their own F-Droid app that can notify you of updates. Very handy!
Click to expand...
Click to collapse
True. Had came to know about F-Droid when the ad blockers are taken down from Google Play. It has very large collection, so adding it to the OP.

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I wanna say thanks for the lists, I am working at learning as much as I can. I just started app dev about a week ago, so this will help out a lot.

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Yay! Floating Stickies and RoundR! Awesome! Thanks and great job!

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Mohammad_Adib said:
Yay! Floating Stickies and RoundR! Awesome! Thanks and great job!
Click to expand...
Click to collapse
Great job on those two open source apps too. :good:

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MathMan is open source app by me
link : http://forum.xda-developers.com/showthread.php?t=2252259

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Oyster Mate isn't on the list: https://github.com/andybotting/oystermate

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UpGado said:
MathMan is open source app by me
link : http://forum.xda-developers.com/showthread.php?t=2252259
Click to expand...
Click to collapse
Thanks for the link, added.
And Great job on the app too. :good:
sabret00the said:
Oyster Mate isn't on the list: https://github.com/andybotting/oystermate
Click to expand...
Click to collapse
Thanks for the link, added.

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AWESOME
this is absolutely brilliant for the beginner dev like me! this is helping me massively to learn code and much more!! THANKS!
PS: I HIT THANKS BUTTON

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This looks like it could help out a lot. I have an interest in app development. I've just started learning recently and this should really help me understand the order of coding and everything. Nice idea.