Templated is a collection of over 800+ simple CSS, HTML5 & responsive website templates, built and released for free under the Creative Commons.
Colorlib offers some of the best free WordPress themes, responsive and full of options, ranging from business themes to blogs and portfolios.
Just Free Themes offer over 1,000+ awesome, pixel perfect and free WordPress Themes, ranging from eCommerce to blogging to fashion and more.
A collection of 80+ free one page website templates. These free templates are great to quickly test your ideas before committing to a big project development.