Runtime Revolution today announced that Revolution 2.1, the latest update to its multi-platform software development environment, is now shipping. Version 2.1 contain numerous improvements, including improved conformity with the Mac OS X interface style guidelines; support for MySQL, PostgreSQL, ODBC and Valentina, improved support for Mac OS X Aqua appearance; support for drawers and metal appearance on Mac OS X, and more. Revolution is available in three different editions: