Oracle in turn purchased Sun in January 2010, acquiring their copyrights, patents, and trademarks. This made Oracle the owner of both the most popular proprietary database and the most popular open-source database (MySQL). Oracle's attempts to commercialize the open-source MySQL database have raised concerns in the FOSS community. Partly in response to uncertainty about the future of MySQL, the FOSS community forked the project into new database systems outside of Oracle's control. These include MariaDB, Percona, and Drizzle. All of these have distinct names; they are distinct projects and cannot use the trademarked name MySQL.