AbTest.io - A free url shortener with A/B testing features
Rage Grade by FullStory - Benchmark your customer frustration
GoodUI Evidence - People's A/B test results that show which UI ideas work best
UXsniff - Track user behavior on your website and improve conversions with UXsniff: the user experience watchdog that looks out for you.
PreFlight - Preflight is an Automated Web Testing tool. Allows everyone to automate Web UI tests.
UserBit - A full-stack qualitative research platform for UX & product teams.