X3D is the open-standard format for 3D graphics scenes on the Web.
An open source controller for Scalextric community
Simulate high power rocket flights with splash down plots
3D Architecture modelling and physics simulation system
A train simulator wroten in Java.
Free open source game created in Unity 3d for Windows 64 bits
3D-viewer (laserscanning) based on lwjgl
Quick Road Visualizer