Ghidra is a software reverse engineering (SRE) framework

Termux - a terminal emulator application for Android OS extendible by variety of packages.

A libre lightweight streaming front-end for Android.

Browse media content with your own rules on Android TV

Cryptomator for Windows, macOS, and Linux: Secure client-side encryption for your cloud storage, ensuring privacy and control over your data.

Free implementation of Play Services

A podcast manager for Android

OsmAnd

AIMSICD • Fight IMSI-Catcher, StingRay and silent SMS!

Jitsi is an audio/video and chat communicator that supports protocols such as SIP, XMPP/Jabber, IRC and many other useful features.

Modern super user interface implementation on Android.

Distributed Peer-to-Peer Web Search Engine and Intranet Search Appliance

[Unmaintained] Open source two-factor authentication for Android

AFWall+ (Android Firewall +) - iptables based firewall for Android

Android (f/w 2.1+) on screen keyboard for multiple languages.

OpenKeychain is an OpenPGP implementation for Android.

Download apks from Google Play Store

Android application for online privacy and security

Android open source calendar

An unofficial open source Android app for Reddit.

MicroG tweaked to work for applications such as Vanced.

Hacker's Keyboard (official)

📡 ☁️ 🎶Airsonic, a Free and Open Source community driven media server (fork of Subsonic and Libresonic)

Github client for Android

Android ImageView widget with zoom and pan capabilities

Open-source XMPP client for Android

Decentralized private messenger with chat-shared tools and games for Android

c:geo - The powerful Android geocaching app.