Besides giving users a full blown sql editor with code formating, auto statement completion, macros and a load of other goodies, version 3.1 has a drag and drop query builder, ER diagrammer, database admin tool set, advanced data searching, and reporting tools.
Improvements in the latest release include: enhancement in the editor's error highlighting, subqueries for the query builder, and new extensive data compare capabilities. It's a full-blown, uncompromised version for the cost of a download.
Need to debug your functions and stored procedures? You can give Toad for MySQL 4.0 Beta a spin. It gives you breakpoints, local variable inspection, a call stack, and more."