Fancy Accordion is the best accordion module for Joomla, which supports Joomla contents, K2 contents and Joomla modules as well. That means, you can set Joomla articles as accordion, K2 contents as accordion, Joomla Modules as an accordion.
Fancy Bookmarks is the best Social Bookmarking Plugin for Joomla, which comes with Facebook Share, Facebook Like, Twitter, Google +1, Pinterest Pin it Button and multi share to 108 other Social Bookmarking websites.
Fancy Messages is a great extension for Joomla, which facilitates popup and sticky messages. You can use it for announcements, deals, notices, product up-sell dialogues, etc.
Fancy RSS Tabs is the best RSS Newsfeed module for Joomla, where you can define multiple tabs in a nice manner. It comes with 25 pre-built styles and you can simply choose a style and get the layout on the frontend.
Fancy Tabs is best Tabs module for Joomla, which supports Joomla contents, K2 contents and Joomla modules as well.