a parametric 3D CAD modeler
WARNING: FreeCAD has moved! FreeCAD code and release files are now hosted on github at https://github.com/FreeCAD/FreeCAD Only older files and code are available here. FreeCAD is a general purpose feature-based, parametric 3D modeler for CAD, MCAD, CAx, CAE and PLM, aimed directly at mechanical engineering and product design but also fits a wider range of uses in engineering, such as architecture or other engineering specialties. It is 100% Open Source and extremely modular, allowing for very advanced extension and customization. FreeCAD is based on OpenCasCade, a powerful geometry kernel, features an Open Inventor-compliant 3D scene representation model provided by the Coin 3D library, and a broad Python API. The interface is built with Qt. FreeCAD runs exactly the same way on Windows, Mac OSX and Linux platforms.
surfit is an open source and free gridding and contouring software. surfit can do interpolation/approximation of points, contours and surfaces, can take fault lines and trend surfaces into account, can use inequalities and other conditions. Supports a lo
Truevision is a 3D modeler for gnome and povray. It is still in an alpha developpement phase.
OpenCASCADE Sketcher is a C++ library for creating of 2D Sketcher based on OpenCASCADE (www.opencascade.org) library. This sketcher allows to create 2D sketches by using snaps, geometric primitives. It can be used for creating CAD applications.
2D, 3D object indexes (Quadtree, Octree, Quadtree with object radius indexation), fast geometry find functions, template classes with embedded 2D, 3D indexation and fast search features.
Open-source artifical life simulation engine. C++, multiplatform, 3D graphics & physics, animal artifacts (like muscles), neuro-compatible sensors (eye, body feeling, acceleration sensors). OldPortal is complete solution if you try to build true AI.
Portable game engine intended for game development. Include portable 3D-engine for at least DirectX and OpenGL, physics and sound simulation engines, and scripting engine for AI.
The 3D game development studio based on the Eclipse platform featuring modelling, non-linear animation of characters, scripting and deployment support.