Usersnap - Visual Feedback - Usersnap helps your business with its versatile feedback platform to build better, more successful products and services with the help of user feedback. Collect feedback along your product development lifecycle. Try it for free.
Planogy - A feedback platform for all the creative work
Tweakr.io - The fastest way to get visual feedback 📌
Feedback by Pixelic - Painless design feedback and version control.
Sesov - A community for anonymous design feedback
Marvel - Turn sketches, mockups and designs into web, iPhone, iOS, Android and Apple Watch app prototypes.