Irresistible is one of the best free wordpress themes we have seen so far. Made by the talented people at WooThemes, Irresistible is an original grungy grid template.
Allowing you to display everything easily, from your Flickr photostream to a Y video and your latest blog posts, this theme is ideal for personal blogging.
As with all the WooThemes WordPress themes, it comes with their popular backend with loads of options to customise your theme easily. And with the 9 colour scheme to choose from, Irresistible is pretty versatile.