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.
EQUINOX-3D is a 3D modeler with a very fast, fully integrated ray-tracer. It features read/write support for COLLADA, read support for Radiance's .hdr image format, 3DS (3D-studio) file format read support, multi-texturing, custom-programmable texture mapping, bump-mapping with automatic texture-space tangents, the ability to zoom into a region with "fly-to", and more. It includes a full runtime-class framework and a core design that allows for the addition of anything from a physics engine to a fully integrated renderer from a plugin. It is faster and more memory efficient than many other modelers.
Convex 3D is a convertor, extractor, and viewer for such popular 3D formats as 3DS, Wavefront OBJ, and Lightwave 3D. It is written in C++ and uses a modular design. The package includes a standalone conversion tool (console) and GUI application (Qt and OpenGL are required) for viewing and more. It is not meant to be a modeler, but it can be a powerful tool to hack into 3D files made by 3rd party modelers.
E.T. EDITOR is a graphical editor for designing three-dimensional graphs consisting of colored edges and triangles. The intention is to make the modeling process as direct as possible. E.T. TRAVELER lets you view the scenes designed with the E.T. EDITOR. It simulates traveling inside the scene.
XiStrat (aka 'Extended Strategy') is in particular about turn-based, networked multiplayer, non-cooperative, zero-sum, abstract strategy board games (e.g., Chess, Go, Reversi variants, etc.) on 3D-visualized polyhedra and contains a server, client GUI, autoplayer engine, utilities, and documentation. Related recreational modern mathematics (single agent, cellular automata, graph/group/complexity/knot theory, discrete geometry, algebra, combinatorics, and mathematical physics) is also dealt with.
CADTools is a modern 3D computer-aided design (CAD) and manufacturing (CAM) toolkit. The aim of the project is to develop an easy-to-use parametric, feature-based solid modeler with a generic geometrical constraint solver sufficiently robust for real-time mechanical simulations over complex assemblies.