Bookmark OS - Bookmark OS is like Mac or Windows optimized for bookmarks.
SessionStack - Record and replay web app issues. See them the way they happened to end users.
Bookmark It - Create awesome notes on YouTube videos
Balto - Easy feedback with screenshot / videos for your beta apps
PageMarker - Save, organize, annotate and revisit your bookmarks
Video Contact Forms by Typeform - Get 10x more personal with your site's visitors from Day 1