Easy Web Performance Optimization (WPO) using caching: browser, page, object, database, minify and content delivery network support.
Clear all cache for WP Super Cache adds a menu entry to the admin menu to clear the cache completly.
Foundation Press offers the Foundation Framework styles with WordPress Shortcodes. It makes adding styles (Tabs, Buttons, Grid...) pretty easy.
Admin Flush W3TC Cache works with the W3 Total Cache plugin. It simply adds an "Empty All Caches" option to every Admin page.
Integrates a Horizontal YUI Menu in WordPress.