Linkpack - Save, read and share your links
Tettra - Tettra is a company wiki that helps teams manage and share organizational knowledge.
Pocket - When you find something you want to view later, put it in Pocket.
Pegao | Save your links - Save your links, it's free and social
Pocket Listen - Reading is hard. Listen to articles instead.
Obie.ai - Access knowledge quicker without leaving Slack