MySQL - The world's most popular open source database
PostgreSQL - PostgreSQL is a powerful, open source object-relational database system.
SQLite - SQLite Home Page
Oracle Database 12c - Simplify database management and automate the information lifecycle with maximum security.
DB2 - IBM Db2 is database software that can reliably handle multiple workloads and the latest version of Db2 is optimized to provide extreme performance while lowering costs.
MariaDB - An enhanced, drop-in replacement for MySQL