MariaDB, a community-developed fork of the MySQL relational database management system.
Memcached, an in-memory key-value store for small chunks of arbitrary data.
Nginx, a high-performance web, reverse proxy, load balancer and HTTP cache server.
MyRocks MySQL, a MySQL branch from Facebook with RocksDB as a new MySQL storage engine alternative to InnoDB.
MySQL, original branch of MySQL, the most popular SQL RDBMS, now owned by Oracle Corporation.