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

OpenAPI Generator allows generation of API client libraries (SDK generation), server stubs, documentation and configuration automatically given an OpenAPI Spec (v2, v3)

a fast, scalable, multi-language and extensible build system

Open Location Code is a library to generate short codes, called "plus codes", that can be used as digital addresses where street addresses don't exist.

An open source and lightweight music client for Subsonic, designed and built natively for Android.

Better modification of the official Mastodon for Android app

[Xposed module] Enable background playback in YouTube

Introduction from basic to more advanced concepts of Java

An Android View that displays a clock