Appcelerator Titanium has been discontinued. Similar apps include Microsoft Visual Studio, which is free for personal use. Other options are Apache NetBeans, Android Studio, Qt and Flutter. Android Development Tools like Appcelerator Titanium are a crowded field, with more than 50 alternatives for Windows, Mac, Linux, Android and the web.
Cocos Creator is a complete package of game development tools and workflow, including a game engine (based on Cocos2d-x), resource management, scene editing, game preview, debug and publish one project to multiple platforms.
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.
United States
SPA front-end on steroids. Build responsive websites, hybrid mobile Apps (that look native!) and Electron apps using same code for Desktop apps, with VueJs 2.
Romania
EU
Codename One is an open-source Java framework for building mobile, desktop, web and watch apps from one codebase. It compiles mobile apps to native binaries and custom-renders the UI for consistent behavior across platforms. Developers can call native platform APIs when needed.
United States
The Graphics Development Engine for Business and Industry. Build high-quality 3D solutions and deploy to any platform.
SpainEU
DroidScript is an IDE that runs on Android devices for coding, testing and building apps to run on Android. Code is written in javascript with objects and methods for layout, controls, sensors, camera, web, files, etc.
Create mobile application for iOS and Android devices (smartphone or tablet; including iPhone, iPod, iPad or Samsung Galaxy) using your HTML5 website.
Onsen UI provides UI framework and tools for creating fast and beautiful HTML5 hybrid mobile apps based on PhoneGap / Cordova. Works with or without any JavaScript framework including React, Meteor, Vue, AngularJS & 2.
Web Atoms is set of powerful tools (NuGet packages, NPM packages) to build native cross platform Xamarin Forms apps with JavaScript. With JSX, you can write UI instead of Xaml. And you can do push code (hot reload in production).
India
React Studio lets you create components either visually or in code, then use them interchangeably in your designs.
United Kingdom
Build native mobile apps for multiple platforms from a single HTML5 codebase. You write your HTML5 code using the Forge JavaScript API which gives you access to native features such as the camera and contacts API.
Japan
