AngusJohnson / Clipper2

Polygon Clipping, Offsetting & Triangulation in C++, C# and Delphi

MeshInspector / MeshLib

3D geometry processing SDK: fast mesh boolean, mesh repair, decimation, remeshing, offset, point cloud triangulation and ICP registration. C++ with Python, C#, C and JavaScript bindings.

ChoppDev / AlterEgo-CS2

High-performance C++20 research framework for Source 2. Features sub-tick angle decoupling, multiplex hitscan tracing, dynamic lag record reconstruction, and Direct3D overlay rendering.