MariaDB is one of the most popular database servers in the world. It's made by the original developers of MySQL and has largely replaced MySQL in most Linux distributions.

MySQL is one of the most popular database servers in the world and is now owned by Oracle, though it is still available as Open Source. MySQL is a popular choice for use in web applications and is the 'M' in LAMP, an acronym for "Linux, Apache, MySQL, Perl/PHP/Python".