I partially self-nominate graph: A library that provides a collection of high-performant graph algorithms and an API for building your own algorithms.
It is build to support parallel algorithms on large-scale graphs with billions of nodes and edges. In addition to the Rust library, it also offers a Python extension and an Arrow Flight based RPC interface.
We just released a new version that can be used on stable, thanks to the stabilization of GATs.
The library is written by a friend of mine and myself.