Incoming Feedback by Hotjar - Instant visual feedback for your website or app!
PreFlight - Preflight is an Automated Web Testing tool. Allows everyone to automate Web UI tests.
Customer Feedback Portal - Ask customers what you should build next
AbTest.io - A free url shortener with A/B testing features
Feedback Fish - Collect feedback & make your customers happy.
Marpipe - Automate Your Ad Testing, Optimize Your Creative