AbTest.io - A free url shortener with A/B testing features
Leanplum A/B Testing - Leanplum A/B Testing is a service that helps you maximize ROI by improving customer’s experience and building loyalty with the brand.
GoodUI Evidence - People's A/B test results that show which UI ideas work best
Apptimize - Mobile A/B Testing for iOS and Android. Improve Your Native App Codelessly in Real-time.
PreFlight - Preflight is an Automated Web Testing tool. Allows everyone to automate Web UI tests.
StoreMaven - A/B testing and design platform for App Store and Google Play icons, screenshots and videos.