Pocket - When you find something you want to view later, put it in Pocket.
Lunyr - A decentralized crowdsourced encyclopedia.
Raindrop.io - All your articles, photos, video & content from web & apps in one place.
Curius - Save links and highlights to a beautiful personal page
Tettra - Tettra is a company wiki that helps teams manage and share organizational knowledge.
Tealfeed - A knowledge sharing platform to empower creators