SQLGrinder is another DBA tool, this one using JDBC for connectivity. $59 to register. My initial attempts at using it to connect to a MySQL database on a different machine weren't successful, but then, so far everything I've tried to connect to a MySQL database on a different machine have been unsuccessful.
BuildFactory is a continuous integration tool that runs on the Mac, integrated with Subversion and various editors. $35 to register. I don't need this yet, but might come in handy in the future.