Elegant Themes - Simple, yet beautiful WordPress themes with easy to use implementation and support.
UI Movement - The best UI design inspiration, daily
MH Themes - An online platform where you can get premium Magazines themes online for your sites like news, blogs, and others.
UI8 - Carefully crafted UI design assets
ThemeGrill - ThemeGrill is an online marketplace that develops and sells WordPress themes and plugins that you can buy to create professional websites for businesses, magazines, and blogs.
UI Garage - Specific mobile and web design patterns for your inspiration