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

A libre lightweight streaming front-end for Android.

Lightning fast, open-source, < 250kb Android launcher

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

A simple way to block access to the internet per app

📷 Instagram private API in Java

Privacy Friendly QR Code Scanner for Android

A T9 keyboard for Android devices with a hardware keypad.

Deep computer-vision algorithms for the Processing framework.

a powerful open-source project, dedicated for people who want easily but effectively to create simple and even powerful android applications.

Random Time Division Multiple Access protocol implementation.