Whatis - Manage & organize your team's knowledge straight from Slack
UserTesting.com - Usability testing has never been easier. Get videos of real people speaking their thoughts as they use websites, mobile apps, prototypes and more!
Slack-News - Read news from multiple sources within Slack by just typing
Instabug - The top apps in the world rely on Instabug for beta testing, user engagement and crash reporting.
Slack It - A bookmarklet to share links in Slack with one click
Userbrain - Easy, fast, and affordable user testing for websites and prototypes.