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.

BoostHQ - An online community platform for your employees to gain knowledge, share experiences and learn from each other.

Tettra - Tettra is a company wiki that helps teams manage and share organizational knowledge.

Noat Cards - A knowledge learning and sharing platform