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.
VWO - Use VWO to tweak, optimize & personalize your website with minimal IT help.
Atlassian Design - Design, develop, and deliver
Google Analytics - Improve your website to increase conversions, improve the user experience, and make more money using Google Analytics. Measure, understand and quantify engagement on your site with customized and in-depth reports.
The Adventures of UX Hero - The world’s first User Experience comic series