These are the the 10 awesome themes featured on wordpress which are available free..!!!
1. jQ – A very clean WordPress Theme with two columns, four widget areas and theme options. It features a jQuery dropdown menu, a jQuery font resizer and a jQuery-optimized post index. Theme options include movable sidebar, custom colours, a choice between page or category navigation and several style schemes.
2. Constructor – WordPress Constructor Theme, it’s many-in-one theme (six layouts, configured colors, fonts and slideshow, widget ready). Build your own theme on settings page. For WordPress version 2.7+ (include 2.8)
3. Atahualpa – Version 3.4.4 – Build your own unique, professional and browser-safe WordPress Theme: 1-5 columns, fluid or fixed width, rotating header images and 2 dozen option pages. Support and tutorials at our forum.
4. LightWord – Simply clever theme with two columns, right-sidebar, fixed-width, widget-ready and threaded comments. Compatible with WordPress 2.8, valid XHTML & CSS. Stay updated!
5. monochrome – This theme supports widget, threaded-comments, theme-options,and translation is ready. Also including page-navigation and multi level dropdown menu.You can see live demo including more information here http://www.mono-lab.net/demo1/
6. Arclite – Simple but elegant theme with lots of theme options. Designed by digitalnature.
7. Pyrmont V2 – A dark WordPress theme. Build in links and archives pages. Widget support. The theme is released under GPL.
8. Fusion – Light and clean WordPress theme from digitalnature. Localization support and theme options available
9. iNove – Inspired by MacZone.sk, created by mg12. It is very stylish, widget supported and doesn’t require any plugin.
10. Cordobo Green Park 2 – Lightweight fast-rendering theme with 2-3 column layout and right sidebar, Widget-ready (4 slots), built-in support for plugins (e.g. twitter), support for threaded/nested comments, fully localized, easy to customize via settings-page. By Andreas Jacob.