This required more time if compared to Libreoffice versus Open Office, but it seem that the critical mass of users of another piece of open source software is moving away from Oracle, I’m talking about Mysql versus MariaDB.
Mysql is probably the most used open source database, it’s used in most of the more successful LAMP applications, such as WordPress, Drupal or Magento, after all the M of LAMP was an acronim for Mysql until today.
All started back in February 2013 when two large open source projects, Fedora and openSUSE, announced their intention to abandon the venerable MySQL database, now a property of Oracle, and adopt instead MariaDB.
In short MariaDB is a community-developed fork of the MySQL relational database management system, the impetus being the community maintenance of its free status under the GNU GPL, as opposed to any uncertainty of MySQL license status under its current ownership by Oracle. The contributors are required to share their copyright with Monty Program AB more information on this project on Wikipedia