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jQuery Mobile BB10 Theme is my current choice depsite it is still in beta. Hopefully, BlackBerry will add more effort to push a official release soon, very soon.
JQuery and JQuery for mobile.
I use Cocos2d-HTML5 for a little game I make tageting the Z10 and Q10. Quite nice to use.
jQuery, jQuery Mobile, Sensa Touch, bbui.js
JQuery and JQuery Mobile
JQuery and Jquery mobile with HTML5