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
Merrier - Turn your worries into a fun game! 💪
Slack It - A bookmarklet to share links in Slack with one click
Obie.ai - Access knowledge quicker without leaving Slack