rbush
High-performance 2D spatial index for rectangles (based on R*-tree with bulk loading and bulk insertion algorithms)
kdbush
A very fast static 2D index for points based on kd-tree.
geojson-vt
Slice GeoJSON data into vector tiles efficiently
wkx
A WKT/WKB/EWKT/EWKB/TWKB/GeoJSON parser and serializer