BRL-CAD is a powerful constructive solid geometry solid modeling system that includes an interactive geometry editor, ray-tracing support for rendering and geometric analysis, path-tracing for realistic image synthesis, network distributed framebuffer support, and image and signal-processing tools.
Coin is an implementation of Open Inventor. Open Inventor is the de facto standard API for retained-mode 3D graphics programming. Open Inventor has a highly extensible design, and has been designed to allow for rapid development of highly interactive 3D graphics applications in the fields of CAD, engineering, scientific computing, simulation, VRML, and visualization.
The GNU Triangulated Surface Library (GTS) provides a set of useful functions to deal with 3D surfaces meshed with interconnected triangles. It features metric operations (area, volume, curvature, etc.), 2D Delaunay and constrained Delaunay triangulations, robust geometric predicates and set operations on surfaces (union, intersection, etc.), surface refinement and coarsening (multiresolution models), and bounding-boxes trees for collision/intersection detection.
K-3D is a 3D modeling, animation, and rendering system for GNU/Linux & Win32. Features include creation and editing of geometry in multiple realtime OpenGL solid, shaded, and texture-mapped views; unlimited undos and redos; complete extensibility at runtime through third-party plugins; animated procedural geometric effects; all parameters animatable through a consistent control-spline based interface; rendering pipeline to Renderman Interface compliant rendering engines; optimization for use with the Aqsis rendering engine, which features solid modelling, true displacement, and user programmable shaders; and support for background and batch rendering.
Deciduous Evolution uses a 3D recursive algorithm for drawing binary trees using intersecting cylinders in 3D space. All adjustable aspects of this algorithm are parameterized, and these parameters are evolved using a genetic algorithm. Statistics describing various metrics of the tree are instantiated, and fitness is calculated based on a number of weighted functions of these statistics. The goal of this project is to manipulate these weights to most accurately reflect the laws of nature, and observe the resulting trees. Using only a simple set of parameters, a recursive binary tree's growth can strikingly resemble that found in nature.
WilmaScope is a Java3D application that creates real-time 3D animations of dynamic graph (network) structures. It comes with a number of layout algorithm plugins, and supports the easy creation of plugins for new layout algorithms. 3D geometries for graph element glyphs and algorithms for graph generation and modification are loaded dynamically as plugins, providing an extremely flexible platform for all manner of graph visualisation applications. The system has been applied with considerable success to a number of graph visualisation problems.
Teddy is an OpenGL-based 3D graphics library written in C++. Its main features are simple scene graph and windowing system-enabling multiple cameras, camera windows, and scenes. It focuses on easy and flexible manipulation of models and model materials in the scene graph. It contains a number of primitive objects like sphere, box, and cone, and it can load LightWave object and scene files.