Free and open source voxel art tools - editor, thumbnailer and format
Console-based GLSL Sandbox for 2D/3D shaders shaders
3D modeler, 3D game maker, 3D demo maker
LDraw™ editor for LEGO® style digital building instructions.
Tiny OpenGL Wrapper / 3D Engine in C++
Converts between many 3D data formats
Tiny but powerful single file wavefront obj loader
3D .NET engine for Windows, Linux, Mac