You can download the Brightlight theme at the site below below:
Brightlight is what this site uses. It is fully “hackable” and totally open source. It allows you to do quite a fair bit of restyling and rearranging without serious rewrites. If you are interested in building WordPress websites and want to start with a decent framework, click on the link and download Brightlight. I’d recommend you run it on XAMMP (localhost) to try out design changes.
Have fun and good luck.