Jonathan Richard Shewchuk's Two-Dimensional Quality Mesh Generator and Delaunay Triangulator.
Fast and robust C++ code available under GNU license. Handles arbitrary dimensions, and has high nu...
Lot of categories and links.
Computes convex hulls, Delaunay triangulations, Voronoi diagrams, half-space intersections about a ...
FastGEO, A computational geometry library written in the object pascal language.