I've been developing a mobile app with AngularJS and zeptoJS but the combination of those two is not providing any UI widgets
I've seen this topic: Is there a UI library for angularjs for use in a phonegap app?
but I'm looking for more answers ( really, LungoJS is the only answer? and I'm not going to use jQueryMobile. ). Are there any other light libraries ?
IonicFramework is a framework designed for exactly this purpose. Its fairly modern though. As such it doesn't have much in the way of backwards compatibility.