OneBar - AI-powered Q&A knowledge base for Slack teams
Lurchr - Saves all your Slack links, so you can focus on work
Tettra - Tettra is a company wiki that helps teams manage and share organizational knowledge.
Slack It - A bookmarklet to share links in Slack with one click
Obie.ai - Access knowledge quicker without leaving Slack
Photostash - Automatically save your pictures from Slack to Gdrive