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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.

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.

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

With Adobe AIR, developers can use proven tools to build rich Internet applications (RIAs) that deploy to the desktop. Try it today.

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.

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.

The Objective-C language is a simple computer language designed to enable sophisticated object-oriented programming. Objective-C is defined as a small but powerful set of extensions to the standard ANSI C language. Its additions to C are mostly based on Smalltalk, one of the first object-oriented programming languages. Objective-C is designed to give C full object-oriented programming capabilities, and to do so in a simple and straightforward way.

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.

WebDGap allows you to convert any website or HTML/CSS/JavaScript web application to a native Windows, Mac, Linux, and Chrome application.

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.

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.

Cappuccino is a framework which makes it easy to create advanced web apps. With just a few lines of code you can have an app built with full undo and redo, truly amazing table views, drag and drop and every modern UI appearance and behaviour you might expect on the desktop.

Corona has become one of the world's most advanced mobile app development tools.

HealthKit allows apps that provide health and fitness services to share their data with the new Health app and with each other. A user’s health information is stored in a centralized and secure location and the user decides which data should be shared with your app.