Slack News Feed - Get the top posts from every Slack chat you're in.
Top Daily Hunts in Slack - A simple, fast way to browse news within Slack
Lurchr - Saves all your Slack links, so you can focus on work
Pushpop for Slack - Push your analytics data into Slack
Slack It - A bookmarklet to share links in Slack with one click
Tettra - Tettra is a company wiki that helps teams manage and share organizational knowledge.