An updated version of the classic "Basic Computer Games" book
Android, UIQ 3.0, Series 60 Edition 5 open-source software
Chess application whichs allows working with chess PDF books and PGNs.
Game engine supporting many 3D/2D formats and graphic effects
The Sokoban game implemented in Java.
X3D is the open-standard format for 3D graphics scenes on the Web.
Godot game template and component-based framework
A Forge mod that implements SpongeAPI
Full featured MUD server with all the trimmings.