Slack News Feed - Get the top posts from every Slack chat you're in.
Whatis - Manage & organize your team's knowledge straight from Slack
Slack-News - Read news from multiple sources within Slack by just typing
Slack Platform News - News and updates from the Slack Platform direct to your team
Slack It - A bookmarklet to share links in Slack with one click
SlackScreen - Full screen public Slack channel display