Whatis - Manage & organize your team's knowledge straight from Slack
SlackScreen - Full screen public Slack channel display
Slack-News - Read news from multiple sources within Slack by just typing
Slack News Feed - Get the top posts from every Slack chat you're in.
Slack It - A bookmarklet to share links in Slack with one click
Aggreto - Aggreto, a powerful social media aggregator tool and UGC platform that allows you content aggregation from multiple social networks (Facebook, Instagram, Twitter, etc.) for your events, website, and brands.