I just completed and enjoyed the Front-End Web UI Frameworks and Tools on Coursera. It’s part of a Full Stack Framework 6 course specialization.
I’ve taken a couple of courses through Coursera, with some being great and others not so much. This course specialization has been pretty great so far. The courses are very well organized and the instructors do a pretty solid job. They even are very active in the discussions (you’d think it’d be a given, but it’s not).
I’ve been very impressed and am looking forward to the next courses in the specialization. Particularly the angular.js and PhoneGap courses coming up. Good stuff.