GoodUI Evidence - People's A/B test results that show which UI ideas work best
Zeplin - Collaboration app for UI designers & frontend developers
Optimizely A/B Testing - Optimizely A/B Testing is an experimenting platform that uses two or more versions of demographics to the users.
Mightytext - Send & Receive SMS Text Messages from your computer. Sync'd with your Android #
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.
ActiveWords - Auto correct on steroids