Article Inline editing (support for Articles & Categories)
Module Inline editing (support for HTML Modules)
CCK Inline editing (Zoo & FLEXIcontent)
Ark Media Manager pro (with media player & image editing)
User Folder (allowing your users to have their own image & file folders)
Syntax Highlighter (beautifies & formats your HTML code)
Access to Supporting Apps (with a growing repository of plugins).