OneBar - AI-powered Q&A knowledge base for Slack teams
Raindrop.io - All your articles, photos, video & content from web & apps in one place.
Whatis - Manage & organize your team's knowledge straight from Slack
Pocket - When you find something you want to view later, put it in Pocket.
Tettra - Tettra is a company wiki that helps teams manage and share organizational knowledge.
PigeonBot - Send emails via Slack with the /email command