Tabbed Content Module.
RokTabs is a tabbed content module, standalone and sporting its own themes (light and dark). Content is transitions, either by fade or scroll, and is powered by mootools..
Twitter Display Module.
RokTwittie is a module that integrates Twitter into your Joomla site. Display tweets of any username, or even by search terms, as well as your profile information and various other elements from Twitter itself.
Sliding Content Module.