Bookmark OS - Bookmark OS is like Mac or Windows optimized for bookmarks.
Raindrop.io - All your articles, photos, video & content from web & apps in one place.
Linkman - Linkman Pro allows for managing large amount of URLs in its own database.
Siimpl Bookmarking - Start collecting and organizing what interests you
Pocket - When you find something you want to view later, put it in Pocket.
Sum It Up - A micro bookmarker & multicolor highlighter for note keeping