I just published my micro Promise A Library. If you are looking for a micro library for your Deferred Objects look no further. This library was built to support Promise A, can easily replace jquery deferred if you are wanting to lighten the load on your site, and unlike window.Promise it can handle multiple arguments to callbacks. All that and it weighs in about 3kb. Give it a try. https://github.com/josephtveter/fn_deferred