LiveDive is the easy way to talk to your users and make your web app amazing. With LiveDive you can video call with your users while watching them use your web app live right through the browser, with no apps or browser plug-ins required.

Technically, this is a remote moderated usability testing tool with live intercept, which is a bit of a mouthful. What's simple is how valuable and insightful moderated usability testing is, and how easy LiveDive makes it.