by Katsushi Kawamori on WordPress.org
Switch the theme by the user agent. Can be specified user agent by a regular expression.
Settings
Allows theme authors to add page templates to their themes that will be automatically used based on the page's parent.
The only plugin that can properly audit your themes and plugins for LARGE multisite installations (1000+ sites)
Offers your blog visitors a firefox download button in different formats and colors on the sidebar.