Drizzle is a free software/open source relational database management system (DBMS) that was forked from the now-defunct 6.0 development branch of the MySQL DBMS.Like MySQL, Drizzle has a client/server architecture and uses SQL as its primary command language. Drizzle is distributed under version 2 and 3 of the GNU General Public License (GPL) with portions, including the protocol drivers and replication messaging under the BSD license.Early work on the fork was done mid-2008 by Brian Aker.