Collection of Free and Open Source Android apps

• App Stores
• Communication
  • SMS
  • E-Mail
  • Instant Messaging
• Connectivity
• Customization
  • Icon Packs
  • Launcher
• Files
  • Backups
  • File Manager
  • File Sync
  • File Transfer
  • Storage Tools
• Finance
• Navigation
  • Maps
  • Public transportation
• Media
  • Audio / Videoplayer
  • Audiobooks
  • Camera
  • Comics / Manga
  • Games
  • Photos
  • Podcasts
  • YouTube
• Networking
  • Torrenting
  • VPN
• News
  • RSS
  • Read it later
• Organizing
  • Calendar
    • Offline
    • Online
  • Clock
  • Notes
  • Tasks
• PDF
• Privacy
• Security
  • Cryptography
  • Password management
  • Two-Factor Auth.
• Social networks
  • Facebook
  • Reddit
• Tools
  • Keyboard
  • Translation
• Weather
• Web Browsing
• Credits

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App Stores

• F-Droid - App store that only includes FOSS apps. Custom repositories can be added.

• Yalp Store - Downloads .apk files directly from Google Play. (F-Droid, Source Code)

Communication

SMS

• Signal - End-to-End encrypted messenger with SMS fallback, needs phone number. (non-free APK, Source Code)

• Silence - Fork of Signal, provides End-to-End encryption for SMS. (F-Droid, Source Code)

• QKSMS - SMS client with advanced features. (F-Droid, Source Code)

E-Mail

• K-9 Mail - Advanced E-Mail Client. Supports PGP with OpenKeychain. (F-Droid, Source Code)

Instant Messaging

• Conversations - XMPP client with built-in OMEMO and OpenPGP support. (F-Droid, Source Code)

• Riot - Messenger using the Matrix protocol. (F-Droid, Source Code)

• QuasselDroid - Quassel Client (IRC) for android (F-Droid)

• Signal - End-to-End encrypted messenger with SMS fallback, needs phone number. (non-free APK, Source Code)

• Telegram - Messenger, needs phone number. (F-Droid, Source Code) ⚠️ Server isn't FOSS.

• Wire - End-to-End encrypted messenger, doesn't need a phone number. (non-free APK, Source Code)

Connectivity

• GadgetBridge - Use your Pebble/Mi Band/Amazfit Bip/Hplus device without the vendor's closed source application (F-Droid, Source Code)

• KDE Connect - Integrate Android with the KDE Plasma Desktop. (F-Droid, Source Code)

Customization

Icon Packs

• Ameixa - Minimalistic material design icon pack - only apps hosted on F-Droid are supported. (F-Droid, Source Code)

• Ameixa Monochrome - Monochrome version of Ameixa - only apps hosted on F-Droid are supported. (F-Droid, Source Code)

• ICEcons - Icon pack. (F-Droid, Source Code)

Launcher

• KISS Launcher - A very minimalistic launcher. (F-Droid, Source Code)

• Open Launcher - Community driven launcher. (F-Droid, Source Code)

• T-UI - Text based terminal-like launcher. (F-Droid, Source Code)

Files

Backups

• DAVDroid - Synchronize contacts and calendar data with a webdav-supported server (F-Droid, Source Code)

• oandbackup - Can backup and restore apps. Backups can be encrypted with PGP. Needs root. (F-Droid, Source Code)

File Manager

• Amaze - Material design based file manager. - (F-Droid, Source Code)

• Ghost Commander - Dual panel file manager, allows for plugins for SMB and FTP (F-Droid, Source Code)

• Simple File Manager - A simple file manager for browsing and editing files and directories. (F-Droid, Source Code)

File Sync

• Syncthing - P2P file synchronization. (F-Droid, Source Code)

File Transfer

• primitive ftpd - A simple FTP and SFTP (SSH file transfer) server.(F-Droid, Source Code)

Storage Tools

• DiskUsage - Shows storage usage. (F-Droid, Source Code)

• SD Scanner - Rescan the storage for new media. (F-Droid, Source Code)

Finance

• Bitcoin Wallet - Bitcoin Wallet. (F-Droid, Source Code)

• Loyalty Card Keychain - Manage loyalty cards. (F-Droid, Source Code)

• My Expenses - Finance manager. (F-Droid, Source Code)

Media

• DroidShows - Browse and track TV shows. (F-Droid, Source Code)

• Metronome - Metronome app. (F-Droid, Source Code)

Audio / Videoplayer

• Simple Music Player - A clean music player with a customizable widget. (F-Droid, Source Code)

• Vanilla Music - Material Design music player, addons available. (F-Droid, Source Code)

• VLC - VLC media player. (Available in the F-Droid archive, APK, Source Code)

• Vinyl Music Player - Light and slick material design music player. (F-Droid, Source Code)

Audiobooks

• Voice - Minimalist audio book player. (F-Droid, Source Code)

Camera

• Open Camera - Camera app, provides a lot of settings. (F-Droid, Source Code)

Comics / Manga

• Easy xkcd - xkcd reader. (F-Droid, Source Code)

• Tachiyomi - local & online manga reader, has extensions. (F-Droid, Source Code)

Games

• Anuto TD - Tower defense game. (F-Droid, Source Code)

• Minetest - Minecraft like game, supports mods and can connect to servers. (F-Droid, Source Code)

• Simple Solitaire Collection - Solitaire game collection with 14 games (F-Droid, Source Code)

Photos

• A Photo Manager - Manage local photos: Find/Copy/Edit-Exif and show in Gallery or Map. (F-Droid, Source Code)

• Camera Roll - Simple Gallery App for Android, with lovely Material Design. (F-Droid, APK, Source Code)

• Simple Gallery - A gallery for viewing photos and videos without ads. (F-Droid, Source Code)

Podcasts

• AntennaPod - Advanced Podcast player. (F-Droid, Source Code)

YouTube

• NewPipe - YouTube frontend. (F-Droid, Source Code) ⚠️ Connects to Google (YouTube).

• SkyTube - YouTube frontend. (F-Droid, Source Code) ⚠️ Connects to Google (YouTube).

Navigation

Maps

• AddresstoGPS - Search for an address, location, or area using the Google Maps javascript API via AddressToGPS.com to use with other maps apps. (F-Droid, Source Code)

• MAPS.ME - OpenSteetMap client. (Source Code)

• OsmAnd~ - OpenStreetMap client. (F-Droid, Source Code)

Public transportation

• Transportr - Public transport app. (F-Droid, Source Code)

Networking

• Net Monitor - Shows what apps currently have an internet connection. (F-Droid, Source Code)

Torrenting

• LibreTorrent - Torrent client. (F-Droid, Source Code)

VPN

• OpenVPN - OpenVPN client for android. (F-Droid, Source Code)

News

• LibreNews - Breaking news notification app. (F-Droid, Source Code)

RSS

• Feeder - RSS reader - works good with NewPipe, can import .opml files. (F-Droid, Source Code)

• spaRSS - Feed reader. (F-Droid, Source Code)

Read it later

• wallabag - Read it later app as client for wallabag. (F-Droid, Source Code)

Organizing

Calendar

Offline

• Offline Calendar - Calendar app, completely offline. (F-Droid, Source Code)

Online

• Etar - material design based calendar, uses Android Calendar sync. (F-Droid, Source Code)

• Simple Calendar - A simple calendar with optional CalDAV sync. (F-Droid, Source Code)

Clock

• ClockPlus - Alarm clock, timer, and stopwatch application for Android. (F-Droid, Source Code)

Notes

• Markor - Simple Markdown editor with renderer. (F-Droid, Source Code)

• Nextcloud Notes - Client for Nextcloud notes plugins. (F-Droid, Source Code)

• OmniNotes - Open source note-taking application for Android. (F-Droid, Source Code)

• Orgzly - Outliner for notes and tasks in plain-text. (F-Droid, Source Code)

• SealNote - Notepad that provides encryption. (F-Droid, Source Code)

• Simple Notes - A simple textfield for adding quick notes without ads. (F-Droid, Source Code)

• Swiftnotes - Simple notepad. (F-Droid, Source Code)

• Standard Notes - Encrypted Cloud-based Notes. Cross-platform. (APK, Source Code)

Tasks

• OpenTasks - Tasks can be synchronized using DAVDroid. (F-Droid, Source Code)

PDF

• Document Viewer - Supports multiple document formats. (F-Droid, Source Code)

• MuPDF - Small PDF viewer. (F-Droid, Source Code)

• MuPDF mini - Even smaller PDF viewer. (F-Droid, Source Code)

• PDF Creator - Create and edit PDF files. (F-Droid, Source Code)

Privacy

• AdAway - Simple ad blocker using the hosts file (needs root access). (F-Droid, Source Code)

• DNS66 - DNS66 allows blocking host names via DNS. (F-Droid, Source Code)

• Wi-Fi Privacy Police - Prevents sending of known Wi-Fi networks. (F-Droid, Source Code)

Security

Cryptography

• OpenKeychain - Provides OpenPGP security. (F-Droid, Source Code)

Password management

• KeePass2Android - Advanced implementation of the KeePass standard on Android. (APK, Source Code)

• KeePassDroid - A password safe, compatible with KeePass. (F-Droid, Source Code)

• Password Store - Password manager compatible with pass. (F-Droid, Source Code)

Two-Factor Auth.

• andOTP - Provides TOTP, can backup and restore keys encrypted (PGP or Password). (F-Droid, Source Code)

• FreeOTP - Provides HOTP and TOTP. (F-Droid, Source Code)

Social networks

• AndStatus - Low traffic social network client. (F-Droid, Source Code)

• dandelion* - Client for diaspora*. (F-Droid, Source Code)

• Twidere - Microblogging / twitter.com client. (F-Droid, Source Code)

Facebook

• Face Slim - Unofficial app built around the mobile Facebook site. (F-Droid, Source Code) ⚠️ Connects to Facebook.

Reddit

• RedReader - Easy-to-use reddit frontend. (F-Droid, Source Code)

• Slide - Advanced app for reddit. (F-Droid, Source Code)

Tools

• ConnectBot - SSH and Telnet client. F-Droid Source Code

• Easer - Easer is an event-driven Android automation app. (F-Droid, Source Code)

• OctoDroid - GitHub Client. (F-Droid, Source Code)

• SatStat - Read device sensors. (F-Droid, Source Code)

• Share to Clipboard - Copy to clipboard straight from the Android "Share" menu. (F-Droid, Source Code)

• Termux - Terminal emulator, addons available. (F-Droid, Source Code)

• TV KILL - Turn off TVs with your Android device's IR-blaster. (F-Droid, Source Code)

• WiFiAnalyzer - Scans WiFi networks, measuring signal strength and identifying crowded channels in tables and graphs. (F-Droid, Source Code)

Keyboard

• AnySoftKeyboard - Keyboard with many customization options. (F-Droid, Source Code)

• Hacker's Keyboard - A customizable keyboard with full layouts. (F-Droid, Source Code)

Translation

• QuickDic - Offline translation dictionary. (F-Droid, Source Code)

Weather

• Forecastie - Shows weather information from OpenWeatherMap. (F-Droid, Source Code)

• Good Weather - Open source weather app for Android. (F-Droid, Source Code)

• Simple Weather - Shows weather information from OpenWeatherMap. (F-Droid, Source Code)

• Weather - Provides interface for several weather websites. (F-Droid, Source Code)

Web Browsing

• Fennec F-Droid - Rebranded version of Firefox for F-Droid. (F-Droid, Source Code)

• Firefox Klar - Private Mode browser, clear browser data with one tap. (F-Droid, Source Code)

• GApps Browser - Provides WebView for Google Websites. (F-Droid, Source Code)

• Wikipedia - Official Wikipedia Android app. (F-Droid, Source Code)

Credits

Inspired by other awesome lists.