Magic Another Game Engine
A complete 3-D game development suite written in Java
Skript is a Bukkit plugin which allows server admins
Java/JavaFX/Kotlin Game Library (Engine)
SonarSource Static Analyzer for Java Code Quality and Security
Europa Universalis 4 save game editor
Arianne is an engine to develop multiplayer online games like Stendhal
Delphi : VRCalc++ OOSL & + (Paged List, TextEditor, VRAstroVision ...)
Delphi Java - VRCalc++ OOSL (Script) and + (Binary Exec Distro)
Full featured MUD server with all the trimmings.
A simple cross-platform game engine for creating old-school 2D games
Fast-paced side-scrolling space shooter
Android apps.
JPHP - an implementation of PHP on Java VM
8-bit Graphical API for Java
Android OpenGL Game Engine
SJCE - free portable cross-platform graphical chess game, 100% Java.
A tiny game engine to create arcade style 2D games.
Build Cross-platform Applications
Multi-threaded game engine for Android