PinBucket.io - Store and share all your links with your teammates
Raindrop.io - All your articles, photos, video & content from web & apps in one place.
AdHype - The best link shortening service.
Pocket - When you find something you want to view later, put it in Pocket.
Pinboard - Pinboard is a personal archive for things you find online and don't want to forget.
Tettra - Tettra is a company wiki that helps teams manage and share organizational knowledge.