NativeScript It is a open source framework of Telerik that allows you to use JavaScript to build native mobile applications for Apple iOS, Google Android and, in the future, Windows Universal.
Unlike Apache Cordova and PhoneGap in the development of cross-platform applications, NativeScript you get direct access to native APIs and UI performance on native platforms and not an encapsulation in WebView.
It provides a simple way, easy and modern to build native cross-platform mobile applications with JavaScript with the best possible user experience provided by the operating system with a single base code, which simplifies the development and significantly increases productivity.
Other characteristics important in this framework is that you can integrate with the popular Google Javascript AngularJs framework 2.0.
Source: http://developer.telerik.com/featured/nativescript-1-0-0-release-now-available/
Web: https://www.nativescript.org/
Documentation: http://docs.nativescript.org/