FreeWRL is an Open Source, cross platform VRML2 and X3D compliant browser, with script, SAI and EAI support. Platforms supported: Linux and other Unix-style platforms; Mac OS/X; Windows. Support for mobile platforms (iOS, Android, QNX) is under development.
The Zenipex Library is a game development framework, created with the goal of allowing someone with some knowledge of C++ to create 3D games for platforms including Windows, MacOS X, and Linux. OpenGL and Direct3D 9 are both supported.
The SPIN (Spatial Interaction) Framework is a networked system for creating and managing interactive virtual environments. It contains a state server and several clients that provide visualization, layout & editing, management of input devices, etc.
GtkGLExt is an OpenGL extension to GTK+. It provides additional GDK objects which support OpenGL rendering in GTK+, and GtkWidget API add-ons to make GTK+ widgets OpenGL-capable.
Java3D 3DS FileLoader for platforms supporting JDK1.4 and Java 3D
Highly functional, multiplatform 3DS File format loader
Supports:
Heirarchical animation
Cameras
Point Lights
Directional Lights
Textures
Smooth Groups
and other features
SoftWire was the precursor to TransGaming's SwiftAsm. SwiftAsm is an optimizing run-time x86 assembler that can be used as a JIT compiler back-end for scripting languages, or for dynamic code generation of efficient processing pipelines.