HiOperator - HiOperator is a virtual assistant that answers phone calls, chats with customers, provides in-app help, takes orders, and provides support.

AbTest.io - A free url shortener with A/B testing features

Zendesk - Zendesk is a beautiful, lightweight help-desk solution.

Anboto - Anboto provides web customer service and e-Commerce technology based on semantics and natural language processing.

Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.

GoodUI Evidence - People's A/B test results that show which UI ideas work best