Bookmark OS - Bookmark OS is like Mac or Windows optimized for bookmarks.
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.
Siimpl Bookmarking - Start collecting and organizing what interests you
Tweakr.io - The fastest way to get visual feedback 📌
Annotate.tv - Optimize your learning on YouTube
Marvel - Turn sketches, mockups and designs into web, iPhone, iOS, Android and Apple Watch app prototypes.