Free and Open Source, Distributed, RESTful Search Engine

Ghidra is a software reverse engineering (SRE) framework

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

Free universal database tool and SQL client

Dex to Java decompiler

A libre lightweight streaming front-end for Android.

Open Source Identity and Access Management For Modern Applications and Services

Mirror of Apache Kafka

Telegram for Android source

Browse media content with your own rules on Android TV

Jenkins automation server

Desktop/Android/HTML5/iOS Java game development framework

Event bus for Android and Java that simplifies communication between Activities, Fragments, Threads, Services, etc. Less code, better quality.

A Java serialization/deserialization library to convert Java Objects into JSON and back

A tool for reverse engineering Android apk files

JDK main-line development https://openjdk.org/projects/jdk

This project is deprecated and stale. The latest ExoPlayer code is available in https://github.com/androidx/media

IntelliJ IDEA & IntelliJ Platform

A collection of algorithms and data structures

Modular and customizable Material Design UI components for Android

A Java 8+ Jar & Android APK Reverse Engineering Suite (Decompiler, Editor, Debugger & More)

A standalone Java Decompiler GUI

Arduino IDE 1.x

Tink is a multi-language, cross-platform, open source library that provides cryptographic APIs that are secure, easy to use correctly, and hard(er) to misuse.

Tools to work with android .dex and java .class files

Free implementation of Play Services

No clever tagline needed.

A free, secure and open source app for Android to manage your 2-step verification tokens.

jsoup: the Java HTML parser, built for HTML editing, cleaning, scraping, and XSS safety.

A configuration as code language with rich validation and tooling.