SonarSource Static Analyzer for Java Code Quality and Security
Barcode scanning library for Java, Android
Desktop/Android/HTML5/iOS Java game development framework
A J2ME emulator for Android
Free, open source game engine online
Memory Efficient Serialization Library
OpenSoldat is a unique 2D (side-view) multiplayer action game
Gideros Release version
A layer built on top of the Insight Toolkit (ITK)
Modern, lightweight and efficient 2D level editor
An easy to use 2D HTML5 game engine written in TypeScript
Plugin for IntelliJ IDEA that gives special support for Minecraft mods
One framework for creating powerful cross-platform games
Pymunk is a easy-to-use pythonic 2d physics library
A pure Go game engine
Java/JavaFX/Kotlin Game Library (Engine)
Godot Kotlin JVM Module
Engo is an open-source 2D game engine written in Go
Ct.js is a desktop game engine that makes learning programming fun
The Tiny JavaScript Game Engine That Can!
Just another ComputerCraft fork
Native Android app for Habitica
Gameboy emulator in Java 8
scene-oriented, flexible 3D engine (C++, Python, C#, Java)