CGAL - Computational Geometry Algorithms Library - A collaborative effort to develop a robust, easy to use, and efficient C++ software library of geometric data structures and algorithms. Gmsh - Gmsh is a three-dimensional finite element mesh generator, primarily Delaunay, with built-in pre- and post-processing facilities. Gmsh is freely available for Windows and most UNIX platforms. Knotenpunkt - Produces commercial software that creates a surface model out of a pointcloud or polymesh [Balingen, Germany]. Computational Geometry Code - Jeff Erickson's links to freely available implementations of geometric algorithms and software. Fast Industrial-Strength Triangulation - By Martin Held. Copes with polygons with holes and degeneracies/self-intersections; based on repeatedly clipping ears. Source code on request. QMG project - Mesh generation in 2D and 3D on Unix and NT, and related software by Steven Vavasis. Delaunay Triangulation Code - J-D. Boissonnat et al.'s code for Delaunay meshing in 2 and 3 dimensions in C++. Fast Robust Predicates for Computational Geometry - C code for orientation and incircle tests using adaptive-precision floating-point arithmetic Stony Brook Algorithm Repository - Section on Computational Geometry - Summary of major CG problems and implementations of their solutions JeoEdit - Two Java applets for editing polygons and point sets for input to computational geometry software. GTS - The GNU Triangulated Surface Library - Open-source library for manipulating 3D triangular surface meshes. Delaunay triangulations, robust geometric predicates, robust boolean set operations on surfaces, surface refinement and coarsening, level-of-detail, k-d trees, volume and curvature, strips generation. Surface Evolver - Free interactive program for modelling liquid surfaces shaped by various forces and constraints, e.g., minimal surfaces (bubbles). Applies gradient descent to minimize energy. Available for most platforms. Triangle - Jonathan Richard Shewchuk's Two-Dimensional Quality Mesh Generator and Delaunay Triangulator. Smallest Enclosing Ball of Points - Fast and robust C++ code available under GNU license. Handles arbitrary dimensions, and has high numerical stability. Amenta's Directory of Computational Geometry Software - Lot of categories and links. 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. FastGEO Computational Geometry Library - FastGEO, A computational geometry library written in the object pascal language.