The main contenders providing attractive stylings and decent featuresets would be these three...jQuery Mobile
Web 2.0 Touch
The next set seem more geared towards larger, more structured projects that you have taken the time to pre-plan. Overkill for me but YMMV.Sencha Touch 2
The next two offer more general boilerplate code...HTML5 Boilerplate
Finally, these are some further alternatives to the first three. They either didn't grab me as much or I just haven't had time to give them a proper look yet.iWebKit
PS If you want to attempt to squeeze the big guns onto mobile then I guess these are they...Twitter Bootstrap
PPS Only found this one as I was writing this article!Foundation 3
So there you go – we're literally spoiled for choice and it sure is fun!