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

Telegram for Android source

A tool for reverse engineering Android apk files

smali/baksmali

JPEXS Free Flash Decompiler

An Open Source Java Decompiler Gui for Procyon

Termux add-on app which exposes device functionality as API to command line programs.

Android icon pack material dashboard

APKGrabber is a tool that simplifies the process of finding updates for your installed apps.

Reads and writes thousands of different archive and image formats used in games.

Shortyz Crosswords

Reboot and full rewrite of Calclavia's Atomic Science mod

A simple and functional Android app for calculating checksums