BlueBox is an alife open source game.
Pygrid is an open-source and cross-platform pygame/python 2D engine.
Cross platform 2D game creation framework with Python bindings
C-Lesh is a game programming language for 2D games.
General Utility Library
Powerful html5 & javascript library for creating applications & games.
A software to craft easily your own Minecraft mod, without coding
Cross-platform reimplementation of AMOS BASIC (runtime)
Python Killboard Platform for EVE Online
Formerly CraveJs, it's for creating JavaScript applications and games.
A cross-platform OpenGL based lightweight scenegraph library
AMOS BASIC reimplementation in Java
A cross-platform Java 2D graphics library using OpenGL.
A powerful cross-platform and open-source 3-D rendering engine.