@turf/turf
a JavaScript library for performing geospatial operations with GeoJSON
primitive-geometry
Geometries for 3D rendering, including normals, UVs and cell indices (faces). Perfect if you want to supercharge your dependency folder... with 30KB of geometries.
pex-geom
Geometry intersection and bounding volume helpers for PEX.
affineplane
Affine geometry library for 2D and 3D spaces