Tulip is an information visualization framework dedicated to the analysis and visualization of relational data. Tulip aims to provide the developer/user with a complete library/software, supporting the design of interactive information visualization
GLC_lib is a C++ library for high performance 3D application based on OpenGL and QT4 GUI. Some GLC_lib features : Supported file format : 3DS, OBJ, COLLADA, 3DXML, OFF, STL. Easy view manipulation, Level of detail, shaders...
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.
Programmable X3D is a X3D implementation for .NET Framework
Programmable X3D is a open source software library providing application programming interface for software developments on .NET Framework.
A simplified OpenGL wrapper that will allow fast development of OpenGL applications if you're not concerned with the performances.