Tettra - Tettra is a company wiki that helps teams manage and share organizational knowledge.
Obie.ai - Access knowledge quicker without leaving Slack
Linkpack - Save, read and share your links
Pocket - When you find something you want to view later, put it in Pocket.
OneBar - AI-powered Q&A knowledge base for Slack teams
Kifi for Slack - Get links messaged on Slack in Google Search results