This document discusses PhoneGap/Cordova, which allows developers to build HTML5 apps that can run on major mobile platforms like iOS, Android, and Windows Phone. Cordova uses a WebView to render the app's UI and allows access to native device features through plugins. Developers can build Cordova apps like regular web apps and test them in a browser before packaging them as native mobile apps using either each platform's native tools or the PhoneGap Build cloud service. Resources for learning more about Cordova development are also provided.