MySQL Cluster is generally available in version 5.0 of the MySQL database server. Individual MySQL Cluster components are available as stand-alone downloads on supported platforms.
MySQL Workbench
MySQL Workbench is a next-generation visual database design application that can be used to efficiently design, manage and document database schemata.
MySQL also develops Graphical User Interface applications for administering MySQL Server and working with data.
MySQL GUI Tools -- single bundle including all GUI tools (MySQL Administrator, MySQL QueryBrowser and MySQL MigrationToolkit)
MySQL Proxy
MySQL Proxy is a simple program that sits between your client and MySQL server(s) that can monitor, analyze or transform their communication. Its flexibility allows for unlimited uses; common ones include: load balancing; failover; query analysis; query filtering and modification; and many more.
MySQL native driver for PHP - mysqlnd -- the MySQL native driver for PHP is an additional, alternative way to connect from PHP 6 to the MySQL Server 4.1 or newer.