Helix Toolkit is a collection of 3D components for .NET
Xj3D is an open-source Java codebase for the X3D Graphics standard.
crossplatform multithreaded object-oriented render and audio engine
Java3d scenegraph editor
Realtime raytracer using SIMD on ARM, MIPS, PPC and x86
Growth-grammar related Interactive Modelling Platform
Shadow mapping in Qt3D using C++
A declarative 3D globe data visualization library built with Three.js
3D Software Renderer in 700 Lines
Realtime 3D engine for game development
A public domain cross platform 3D game
3D .NET engine for Windows, Linux, Mac
kicad 3D is aimed to add 3D realistic feature on kicad pcb CAD
3D tree generator
simple 3d scene viewer for windows/linux/android
Gimpel3D - 2D/3D Stereo Conversion Editor