Whatis - Manage & organize your team's knowledge straight from Slack
Slack News Feed - Get the top posts from every Slack chat you're in.
Slack-News - Read news from multiple sources within Slack by just typing
Slinky - Your slack links — organized!
Tettra - Tettra is a company wiki that helps teams manage and share organizational knowledge.
Charged newsletter - Weekly roundup of tech, boiled down into bite sized pieces