MailChimp Product Recommendations - Easily build automated personalized email marketing
Useberry - User testing feedback and rich analytics in minutes
Metisa - Product recommendations that learn as your customers shop
Peek by UserTesting - Get a free, 5-minute video of someone using your site
MarsBot - Local recommendations based on where you go. By Foursquare.
Easy User Test - Easy User Test is a user testing tool that offers the easiest way to test your text and design.