DIYthemes produces the Thesis Theme for WordPress, a high-quality template system that you can use to improve your site immediately.

Thesis boasts the strongest SEO of any theme on the market today thanks to its expertly-coded HTML + CSS + PHP framework. Not only that, Thesis also contains additional options that will allow you to fine-tune each and every page of your site. The days of worrying about your in-site SEO are over—with Thesis, your strategy is “just add killer content.”