Javascript Frameworks

Over the last couple of weeks, I've been looking into a lot of javascript frameworks. And there are a LOT out there. A couple of sites I've found useful for evaluating the frameworks -

http://addyosmani.github.com/todomvc/ - This one has the same sample application coded up in the different frameworks for comparison

http://codebrief.com/2012/01/the-top-10-javascript-mvc-frameworks-reviewed/ - a great starting point for comparison based on features. 

After playing around with a few of the frameworks, I'm sure that i want to work with a framework that has UI bindings. Using Silverlight for the last couple of years, I'm hooked onto the concept of two-way UI binding using the MVVM pattern. Anything less is just a lot more cumbersome wiring work. 

Just because of the sheer number of frameworks available, ramp-up time and learning curve become a factor. Knockout.js is a top contender simply based on the fact that they have an outstanding interactive tutorial system.