* [Martinez-Rueda polygon clipping algorithm v0.9.0](https://github.com/w8r/martinez) – Fast Martinez-Rueda polygon clipping library providing intersection, union, difference, and xor operations for GeoJSON Polygon and MultiPolygon geometries.

* [Earcut v3.2.4](https://github.com/mapbox/earcut) – Fast, small JavaScript polygon triangulation library optimized for real-time browser rendering of practical datasets.