Advanced Template Manager is an extension that changes the way your Template manager works. It adds a multitude of functions, like:

Many publishing assignments for your template styles! You can control template styles by (ALL / ANY):
            ☆ Menu Item
            ☆ Homepage
            ☆ Date range
            ☆ User Group Levels
            ☆ Languages
            ☆ Templates
            ☆ URLs
            ☆ Operating Systems
            ☆ Browsers
            ☆ Components
            ☆ Content Page Types
            ☆ Categories
            ☆ Articles
            ☆ Tags
            ☆ ...and more...
    ★ Give templates colour labels in the template list for easy searching
    ★ Improved list and edit views

If you need even more template control, give Chameleon a try:
http://extensions.joomla.org/extensions/11173

Advanced Template Manager is NOT compatible with templates using the Gantry or T3 frameworks.