Calculations in terms of manifolds, mappings, embeddings, submersions, p-forms, tensor fields etc. All calculations are as coordinate free as possible. Some calculations with non-numerical dimension are available. Modern differential geometry notations.

FastGEO, A computational geometry library written in the object pascal language.

Ken ClarkSon's convex hulls, Delaunay triangulations, alpha shapes calculator in C

Two Java applets for editing polygons and point sets for input to computational geometry software.

Qhull computes convex hulls, Delaunay triangulations, Voronoi diagrams, half-space intersections about a point, furthest-site Delaunay triangulations, and furthest-site Voronoi diagrams. It runs in 2-d, 3-d, 4-d, and higher dimensions.

A tool for the algorithmic treatment of polytopes and polyhedra.

A collaborative effort to develop a robust, easy to use, and efficient C++ software library of geometric data structures and algorithms.

J-D. Boissonnat et al.'s code for Delaunay meshing in 2 and 3 dimensions in C++.

Jeff Erickson's links to freely available implementations of geometric algorithms and software.

Links to Surface Reconstruction software, papers, people.