Java3d scenegraph editor
Cross Platform Professional Procedural Terrain Generation & Texturing
For building cross-platform 3D geospatial apps in Java
Vivid is a modern C++ 3D engine using OpenGL4+
Vivid Engine 2 is an open source 3D Engine coded using C# and C++.
realtime 3d surface rendering library
3D .NET engine for Windows, Linux, Mac
XNA based game engine completely written in c#
Pear3DEngine is a modern and modular 3D development framework
This project has moved to http://www.volumesoffun.com
1st 3D game engine built in C# for .NET, Visual3D Engine's predecessor