I'm not sure if you're talking about THE MySQL Workbench, but it's free. I live inside MySQL Query Browser (now replaced by workbench).DBDesigner/Mysql Workbench - Recently DBDesigner turned into MySQL workbench (and now they charge I believe), there is also an app called DBDesigner Fork that is free. These programs are a GUI wrapper for creating database structures, relationships, etc. They are a great way to build and store database structures for complex projects, they easily generate SQL queries & reverse engineer existing databases.