btree

LMDB 1.0 is a high-performance, transactional key-value store database library with ACID semantics, memory-mapped storage, and full thread/process safety. The new version includes upgrades from 0.9 and continues to offer a simple, robust embedded database solution.

Noxu DB is an embedded transactional key-value database engine written in Rust, ported from Berkeley DB Java Edition, offering ACID transactions, B+tree storage, crash recovery, and optional replication.