I am working one cross-platform mobile application. Means once you code for mobile application and that will work on iOS(iPhone & iPad), Android(phone & tabs) and BlackBerry(os 10+). You can save approximately 40% cost on development. I am working on Phonegap, Sencha-Touch, HTML5 and CSS3. I have been working on these technology since June, 2012. I had been submitted 15+ apps on apple store and 15+ on google play store.