A reasonably fast in-memory B+ tree with a powerful API based on the standard Map. Small minified. Well documented.

A persistent B+Tree (clustered index) implementation in Rust.

TypeScript implementation of a Hilbert Packed R-Tree without external dependencies

Rtree: spatial index for Python GIS

Free universal database tool and SQL client

The database client every command line junkie deserves.

SPARQL graph database

TypeDB: the power of programming, in your database

On-Disk B+ Tree implemented in Rust