I've made an open-source library for fast spatial search in Rust.

It's called Spart, and it currently provides the following features:

- Five tree implementations: Quadtree, Octree, Kd-tree, R-tree, and R*-tree

- Python bindings (`pyspart` on PyPI)

- Fast k-nearest neighbor (kNN) and radius search

- Bulk data loading for efficient tree construction

Project's GitHub repo: https://github.com/habedi/spart