GEO is a C++ geometric template class library. Use this library for your graphical, image processing, or scientific applications. It has a rich set of operations with vectors and matrices, 2D and 3D objects (such as finding convex hull and bounding box), triangulation, tesselation, etc.
InformationSpace is a causal set exploration tool. A causal set is basically a set of simple rules that define the relationship between bits in a space time. A common example of this is John Conway's game of life. InformationSpace supports 3D space/time (2D of space, 1D of time). Visualization is in 3D, with Y being time.
Mathnetics is an API for creating advanced, interactive, Web-based mathematical applications. It defines various important mathematical objects that are inter-related and on which many numerical calculations can be done. It also features rendering of 3D objects onto an SVG canvas (to do so, it includes certain utilities such as browser sniffing, DOM node selection, and DOM readiness detection), which is quite robust. A few basic 3D objects are given (Line, Sphere, Cube), but the user can define any 3D object desired as per the specification.
OpenGLUT is an open source project to evolve the GLUT API. It uses the FreeGLUT code base as a foundation for extending, enhancing, and refining the library interface. The initial goal is to define and implement OpenGLUT API Version 1.0, which is intended to supercede the GLUT 3.x API.
Seg3D is a volume editing and processing tool that combines a flexible manual segmentation interface with powerful higher-dimensional image processing and segmentation algorithms from the Insight Toolkit. DICOM, VFF, META, NRRD, and many other volume formats are supported. Users can explore and label image volumes using configurable, orthogonal slice view windows and 3D volume rendering.