Zionn is a free wordpress theme with premium features such as animated gallery, post thumbnail, flickr photos, latest tweets, social bookmark, popular posts and more.

Demo | Download

Features :-

* White + grey as main colours
* Fixed width, widget-ready and gravatar-ready
* Tested on FireFox, IE6, Opera, Safari.
* Tested and working properly up to Wordpress 2.8.4
* Beautify your blog using Post Thumbnail and Post Image
* Featured Posts displayed using animated slideshow
* Tabbed Menu with 3 tabs
* Ready for Google Analytics, Adsense and Webmaster Tools
* Twitter Integration, display latest tweets at footer
* Flickr Integration, share photos easily (needs flickrRSS plugin)
* Feedburner Integration (including showing off your feedcount)
* Built-in plugins such as page navigation and related posts.
* Built-in social bookmark buttons to let your reader share your post easily
* Auto determine and display popular posts at footer
* Four ads spots in sidebar
* Commented CSS files for easy editing
* Custom Theme Options at Admin Panel

I am planning to use this theme for my new blog .