Lot of categories and links.

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

Professional C++ mesh generators. Includes product information and news releases.

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

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

Source code, explanations, file formats, and examples of the Edgebreaker compression and decompression techniques.

By Martin Held. Copes with polygons with holes and degeneracies/self-intersections; based on repeatedly clipping ears. Source code on request.

C code for orientation and incircle tests using adaptive-precision floating-point arithmetic

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

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.

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.

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.

Produces commercial software that creates a surface model out of a pointcloud or polymesh [Balingen, Germany].

A program for exploring topological knots and knot-like objects in a 3-D rendered environment offering stills, animated knots (including dynamic forces) and demos. Aimed at mathematician and artist alike.

Dave Eberley's Code Page: Includes lot of Code that you might need while writing a Computational Geometric Software

A simple C++ R-tree implementation with Segment Incidences Detector as an application.

GDSII viewer + Algorithms for 2d polygon boolean operations, C++ source code

Frequently Asked Questions in Polyhedral Computation.

A tool for the algorithmic treatment of polytopes and polyhedra.

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.

Mesh generation in 2D and 3D on Unix and NT, and related software by Steven Vavasis.

A Free Surface Reconstructor which turns unorganised point clouds to surfaces. Variety of Output Formats. (Surface Reconstruction Software)

Fast and robust C++ code available under GNU license. Handles arbitrary dimensions, and has high numerical stability.

Summary of major CG problems and implementations of their solutions

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.

Links to Surface Reconstruction software, papers, people.

Jonathan Richard Shewchuk's Two-Dimensional Quality Mesh Generator and Delaunay Triangulator.