An embedded, in-memory, lock-free, transaction-based, key-value database engine
Tsurugi - next generation RDB for the new era
A columnar In-Memory Database as Drop-In Replacement for MySQL supporting 10x performance in OLAP workloads and similar performance in OLTP
A distributed OLTP database, built using Rust.
TuplDB is a high-performance, concurrent, transactional, scalable, low-level embedded database.
The lightweight, fault-tolerant database built on SQLite. Designed to keep your data highly available with minimal effort.
Limbo is a work-in-progress, in-process OLTP database management system, compatible with SQLite.
Hyrise is a research in-memory database.