MariaDB provides the same features of MySQL with some extensions. It is relatively new and advance.
A list of the features of MariaDB:
MariaDB can run on different operating systems and support a wide variety of programming languages.
MariaDB is licensed under GPL, LGPL, or BSD.
MariaDB follows a standard and popular query language.
MariaDB provides Galera cluster technology.
MariaDB provides supports for PHP which is the most popular web development language.
MariaDB includes a wide selection of storage engines, including high-performance storage engines for working with other RDBMS data sources.