I have been involved in the conversion of several large intranet applications into mobile versions. The ability to extend applications beyond a typical laptop or desktop onto handheld devices presents many exiting opportunities. It also presents new challenges. Refactoring the user interface for smaller screen sizes, dealing with limited bandwidth and occasionally connected clients, and supporting multiple platforms are all issues I have encountered. I am actively working with both the Android and IOS platforms, however most of my development in this area is with the Sencha Touch framework. I typically deploy web based applications but also have worked with converting HTML 5 apps into native via Phonegap. Please be aware that my experience in the mobile field is focused on business specific type applications, if you are looking for resources for assistance developing game type applications, I would not be the best fit.