GRITT: the Grid Template Tool is a tool designed for Joomla developers and advanced users that allows for the rapid development of Joomla templates. GRITT generates an index.php file as well as templateDetails.xml and a css style sheet. Point and click to define page elements, assign css tags and module positions. Based on the 960GS css framework, GRITT generates templates that are ready to run in almost any environment. All you need to do is fine tune the css, upload your template to Joomla, and assign modules to your positions.
GRITT is distributed free of charge under the GNU/GPL