Making multi-player gamedev simpler since 2017
FlightGear Flight Simulator: free open-source multiplatform flight sim
An interactive viewer for three-dimensional chemical structures.
Extensible Line-drawing & Polygon-filling Rasterization Libs for Java
Opensource Game Studio
LCARS widget toolkit for the Java platform
Web application for displaying in 3D a Survivalcraft world
Open Source 3D Game Engine
3D Interactive sandbox environment
The idea isn't to reach you goals, it's to make progress towards them,
A world editor for HGE game engine written in python and uses OpenGL.
The original Xivio.com World Server Core