Grlib is an implementation of generative grammars and turtle graphics. The grammars (Lindenmayer systems) are used to produce descriptions of three dimensional objects, and the turtle is used to display them (i.e., generate images in several forms, such as bitmap, PostScript, or OpenGL).
vtkContainers is a container library for VTK. It provides list, deque, and vector sequence types; set, map, and hash map associative types; and stack, queue, and priority queue adaptor types. All container implementions except hash map are wrappers around an internal C++ STL type. Similar to a vtkCollection, all containers register objects on insertion, unregister them on removal, are wrappable into other languages, and are covered by a unit testing suite. vtkContainers also provides many unique capabilities, higher performance, and support for object level locking.
QuartzCrystal is an application for rendering Quartz compositions to QuickTime movies and image sequences. It supports third party plugins (using both the official and unofficial API), as well as unsafe patches. It also supports spatial supersampling (antialiasing) and temporal supersampling (motion blur).
KStereoScope is a simple OpenGL quad-buffered stereoscopic image viewer for KDE. Currently it does nothing but display 3D images (JPS/PNS) that are viewable only with LCD shutter glasses and a professional video card. Future releases will include support for anaglyphs and interleaved images.
ZOE (formerly OGLE) is a simple OpenGL graphics engine written entirely in Python. Its primary focus is rapid prototyping and experimentation, so it only supports the barest essentials, with focus on wire frames. Special emphasis is placed on particle systems (in which non-interacting particles follow simple rules). Some familiarity with OpenGL is expected, although when exploiting the particle system abstractions, no specific OpenGL knowledge is required. The demos included are the obligatory spinning polyhedra, static views of conic sections and the Solar System, a 3D surface plotter, a fountain of sparks, a swarming behavior model, a random walk example, a whirlpool effect using gravity and drag, and an example of chaos theory and sensitivity to initial conditions.