Easy User Test - Easy User Test is a user testing tool that offers the easiest way to test your text and design.
SEOTrack - Compare website traffic vs SEO changes done at the same time
Useberry - User testing feedback and rich analytics in minutes
Monkey Test It - Primate powered algorithms that scan your site for common bugs and SEO mistakes.
Peek by UserTesting - Get a free, 5-minute video of someone using your site
Marvel - Turn sketches, mockups and designs into web, iPhone, iOS, Android and Apple Watch app prototypes.