[jonobr1]

I was not aware of these other event systems in JavaScript. Thanks for pointing these out!

[bfm]

You also have Backbone events extracted from Backbone on https://github.com/bermi/eventify

[imjared]

Just to add to the list: https://github.com/necolas/emitter.js

:)

[ajacksified]

Or http://github.com/ajacksified/Mediator.js :D

[ianstormtaylor]

or https://github.com/component/emitter if you wanted to get real modular and release the library as smaller Components.