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.
Bookmark It - Create awesome notes on YouTube videos
Feedback by Pixelic - Painless design feedback and version control.
Bookmark OS - Bookmark OS is like Mac or Windows optimized for bookmarks.
Sesov - A community for anonymous design feedback
PageMarker - Save, organize, annotate and revisit your bookmarks