If you're open to the idea of targeting HTML5, either for the web or embedded in an app, I'd recommend http://www.sencha.com/products/gxt/ http://www.sencha.com

If you're open to the idea of targeting HTML5, either for the web or embedded in an app, I'd recommend http://www.sencha.com/products/gxt/ http://www.sencha.com/products/gxt/. This is built on top of GWT, which is basically a Java->JS compiler and which has its own widget library. You can try GWT's own widgets, but I found them very limiting and frustrating.