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Qt Creator is a cross-platform C++, JavaScript and QML integrated development environment which is part of the SDK for the Qt Framework.

PhoneGap is an open source development tool for building iPhone, Android, Blackberry and other mobile apps with JavaScript.

If you can build a website, you can build a desktop app. Electron is a framework for creating native applications with web technologies like JavaScript, HTML, and CSS. It takes care of the hard parts so you can focus on the core of your application.

Apache Cordova is a set of device APIs that allow a mobile app developer to access native device function such as the camera or accelerometer from JavaScript. Combined with a UI framework such as jQuery Mobile or Dojo Mobile or Sencha Touch, this allows a smartphone app to be developed with just HTML, CSS, and JavaScript.

Ionic makes it easy to build native-quality hybrid interactive applications using HTML5 and JavaScript.Built with Sass, optimized for AngularJS.

Type intelligentlyWorld-class code completion unlocks the iOS, Android, and OS X APIs. Quickly look up methods and types, and discover API functionality.

NW.js, previously known as "node-webkit" project, is an app runtime based on Chromium and Node.js. You can write native apps in HTML and Javascript with NW.js. It also lets you call io.js modules directly from the DOM and enables a new way of writing native applications with all Web technologies.

A unified, HTML5-based user interface system for all popular mobile device platforms, built on the rock-solid jQuery and jQuery UI foundation. Its lightweight code is built with progressive enhancement, and has a flexible, easily themeable design.

React Native enables you to build world-class application experiences on native platforms using a consistent developer experience based on JavaScript and React. The focus of React Native is on developer efficiency across all the platforms you care about — learn once, write anywhere. Facebook uses React Native in multiple production apps and will continue investing in React Native.

Appcelerator Titanium, offered for free by Appcelerator, lets web developers use web technologies, open source and cloud computing to build native apps for iPhone, Android, Windows, Mac OSX and Linux.

Intel® XDK provides a simplified workflow to enable developers to easily design, debug, build, and deploy HTML5 web and hybrid apps across multiple app stores, and form factor devices.Experience Intel® XDK - the easy and fast wayto get your apps to market.

Rapid Application Development tools for native Android, iOS and desktop applications. The simple way to quickly program real world apps. Programming language similar to Visual Basic.

NativeScript lets you develop truly native apps for iOS and Android from a single code base of JavaScript or TypeScript, XML and CSS. NativeScript takes your cross-platform code and translates it into the language that your target platform speaks.

React.js powered UI framework for developing beautiful hybrid mobile apps.

Convertigo is the most advanced Open Source Mobile Application Development Platform for Enterprises, featuring all the required components needed to develop and to run cross-platform mobile enterprises application connected to enterprise's back-end business applications.