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
Slinky - Your slack links — organized!
Fastgrep - Find and organize your Slack team's links and files
Top Daily Hunts in Slack - A simple, fast way to browse news within Slack