Planogy - A feedback platform for all the creative work
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.
FakeClients Feedback - 🖌 A simple, free to use platform for design feedback
Feedback by Pixelic - Painless design feedback and version control.
Marvel - Turn sketches, mockups and designs into web, iPhone, iOS, Android and Apple Watch app prototypes.
Airsketch - Simple screenshots + annotations for Mac 🖥️