Tettra - Tettra is a company wiki that helps teams manage and share organizational knowledge.
Lurchr - Saves all your Slack links, so you can focus on work
Obie.ai - Access knowledge quicker without leaving Slack
Fastgrep - Find and organize your Slack team's links and files
Slack News Feed - Get the top posts from every Slack chat you're in.
Kifi - bookmarks made social