MySQL Database
MySQL is one of the biggest open Source Database. The Scalability, High Performance, Different type of Database Engines makes is a really high performer and competitor with database giant like Oracle.
You can download MySQL package from http://dev.mysql.com/downloads/
Installation process, Configure User, Configure Database, Configure Table, Manage Indexes, Events, Database Engines, Database Load Balancing and Replication, Database Upgrades and some important notes are available.