Optimizely - A/B testing you'll actually use.
UXsniff - Track user behavior on your website and improve conversions with UXsniff: the user experience watchdog that looks out for you.
Dynamic Yield - Personalization & customer experience management
Atlassian Design - Design, develop, and deliver
AB Tasty - AB Tasty is an all-inclusive platform for conversion rate optimization, personalization, customer activation, and testing.
The Adventures of UX Hero - The world’s first User Experience comic series