UXsniff - Track user behavior on your website and improve conversions with UXsniff: the user experience watchdog that looks out for you.
Instabug - The top apps in the world rely on Instabug for beta testing, user engagement and crash reporting.
Rage Grade by FullStory - Benchmark your customer frustration
UserTest.io - User testing made simple. High-quality, affordable user testing solutions from real users, here in the UK. Improve your usability!
Talebook - Understand your client and kick-off your new project!
Userbrain - Easy, fast, and affordable user testing for websites and prototypes.