WebAppers has published an infographic on JavaScript frameworks and their relative popularity. No doubt some of you will point out that jQuery is better described as a library than a framework, but since WebApps is counting it as a framework, it's obviously the most popular one. MooTools is the second most popular, followed by jQueryUI and Prototype.

The infographic is based on data from W3Techs.

See the full version at WebAppers.