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.

DevDojo - Dev tools and resources for building awesome stuff

Optimizely - A/B testing you'll actually use.

UX Recipe - Checklist to discover your next UX project tools/techniques

Smartlook - Qualitative analytics for websites and mobile apps Start understanding the 'whys' of your users' behaviors with clear, visual insights. With session recordings and event tracking, you get the complete picture.

UXsniff - Track user behavior on your website and improve conversions with UXsniff: the user experience watchdog that looks out for you.