We have been using Zendframework for a long time now. Here you can find some samples of our work using it for backend and frontend programming.
iPad poll apps.
This apps are not available on the Apple Store.
Mobile app for iOS and Android.
Made with phonegap, backbone.js and twitter bootstrap.
Responsive shopify theme using liquid, twitter bootstrap, jquery, html5 and css3
We consider wordpress just the perfect tool to use for some projects.
We have created some cool flash/actionscript banners in the past.