G# is a computational geometry math library for .NET.
It features conforming Delaunay triangulations, 2d and 3d convex hulls, smallest enclosing circles and rectangles, bounding boxes and much more. It easily handles large point sets.
PLUS: Access exact and floating point arithmetic predicates!
ComputationalCAD is an easy to use, top-performing and robust computational geometry add-on for AutoCAD®. It makes Delaunay triangulations and Digital Terrain Modeling, surface reconstruction, convex hulls, container-loading tests and much more available in AutoCAD.