Raindrop.io - All your articles, photos, video & content from web & apps in one place.
Bookmark OS - Bookmark OS is like Mac or Windows optimized for bookmarks.
Superdense - No text, just icons.
SkyBucket - Save and manage all your bookmarks on one board
Siimpl Bookmarking - Start collecting and organizing what interests you
BrainyTab - Bookmark manager that makes you smart(er)