Weex - A framework for building Mobile cross-platform UI

•    Javascript

Weex provides the ability to publish cross platform, so web, Android, and IOS apps can use the same API development functions. At the same time, it provides a rich extension of the native interfaces. In this way, it will be very convenient when you need to extend native components or modules.

OnsenUI - Cross-Platform HTML5 Hybrid App Framework

•    Javascript

Onsen UI is a library of UI components to help you create beautiful hybrid and mobile web apps for both Android and iOS using Javascript. It enriches the user’s experience for mobile web apps with natively designed UI elements.

React Native - A framework for building native apps with React.

•    Javascript

React Native lets you build mobile apps using only JavaScript. It uses the same design as React, letting you compose a rich mobile UI from declarative components. With React Native, you don't build a “mobile web app”, an “HTML5 app”, or a “hybrid app”. You build a real mobile app that's indistinguishable from an app built using Objective-C or Java. React Native uses the same fundamental UI building blocks as regular iOS and Android apps.

Framework7 - Full Featured HTML Framework For Building iOS & Android Apps

•    Javascript

Framework7 - is a free and open source mobile HTML framework to develop hybrid mobile apps or web apps with iOS & Android native look and feel. It is also an indispensable prototyping apps tool to show working app prototype as soon as possible in case you need to. The main approach of the Framework7 is to give you an opportunity to create iOS & Android apps with HTML, CSS and JavaScript easily and clear.

NativeScript - Build native iOS and Android apps using JavaScript

•    Typescript

NativeScript is a framework for building native iOS and Android apps using JavaScript and CSS. It renders UIs with the native platform’s rendering engine, no WebViews, resulting in native-like performance and UX. It provides a best-of-both-worlds development experience, its cross-platform JavaScript modules give you the convenience of writing iOS and Android apps from a single JavaScript codebase, while its runtimes gives you the power of accessing native APIs, SDKs, and frameworks.

Ionic - HTML5 Mobile Framework for building cross-platform hybrid native apps and mobile websites

•    Javascript

Ionic is the open source HTML5 Mobile Framework for building amazing, cross-platform hybrid native apps and mobile websites with HTML, JavaScript, and CSS. If you know how to build or design websites, you will be able to build a real mobile app with Ionic.

Neutralinojs - Build browser based cross platform apps with JavaScript, HTML, and CSS

•    C++

NeutralinoJs is a portable and lightweight framework to develop apps with native functions and allows you to run inside web browsers. In electron and NWjs you have to install NodeJs, hundreds of dependence libraries and also the bundled app size is large even we write hello world due to embedded chromium and Node runtime. Neutralino is lightweight solution for this issue.

Convertigo

•    Java

Mobile Application Development Platform for Enterprises

FlutterCinematic - Flutter clone of my "Cinematic" App

•    Dart

This app is a Flutter port of the native Android App Cinematic. My intention in creating this app was understanding the intricacies of building apps in Flutter. Just like the native Android App this app does not make any efforts in being a nicely architectured application. That being said the whole point is to showcase Flutter's capabilities for building simple apps and to understand key difference and advantages to native development. The app uses the Movie DB Public API as a data sources and uses the standard dart libraries for making network requests.

boden - Purely native C++ cross-platform framework for Android and iOS development

•    C++

Note: This is a beta release. The Boden API is not yet fully complete and stable. On a Mac: macOS 10.14+, Xcode 10.1+, Python 3.4+, CMake 3.10.2+.

Weex - A platform for building Mobile Cross-Platform UI

•    Javascript

Weex dedicates to enable developers to use modern web development experience to build both Android, iOS and web apps with a single codebase. In practice, you can use javascript and modern front-end frameworks to develop mobile apps after integrating the WeexSDK. The structure of Weex is decoupled, the render engines are separated from the syntax layer. Weex doesn’t rely on any specific front-end framework, it mainly supports Vue.js and Rax.

Flutter - Framework for building high-performance, high-fidelity iOS and Android apps

•    Dart

Flutter is Google’s UI toolkit for building beautiful, natively compiled applications for mobile, web, and desktop from a single codebase. Flutter’s widgets incorporate all critical platform differences such as scrolling, navigation, icons and fonts, and your Flutter code is compiled to native ARM machine code using Dart's native compilers.

Vue Native - Framework to build cross platform native mobile apps using JavaScript

•    Javascript

Vue Native is a framework to build cross platform native mobile apps using JavaScript. It is a wrapper around the APIs of React Native. So, with Vue Native, you can do everything that you can do with React Native. With Vue Native, you get the simplicity of Vue.js and the seamless interop with React Native.

calabash-ios - Calabash for iOS

•    Ruby

After delivering support for the final releases of iOS 11 and Android 8 operating systems, Microsoft will discontinue our contributions to developing Calabash, the open-source mobile app testing tool. We hope that the community will continue to fully adopt and maintain it. As part of our transition on the development of Calabash, we've provided an overview of mobile app UI and end-to-end testing frameworks as a starting point for teams who are looking to re-evaluate their testing strategy. Please see our Mobile App Testing Frameworks Overview document. Calabash is an automated testing technology for Android and iOS native and hybrid applications.

skinny-framework - :monorail: "Scala on Rails" - A full-stack web app framework for rapid development in Scala

•    Scala

Skinny is a full-stack web app framework to build Servlet applications. To put it simply, Skinny framework's concept is Scala on Rails. Skinny is highly inspired by Ruby on Rails and it is optimized for sustainable productivity for ordinary Servlet-based app development.

LiteApp - LiteApp is a high performance mobile cross-platform implementation, The realization of cross-platform functionality is base on webview and provides different ideas and solutions for improve webview performance

•    Javascript

LiteApp is a high performance mobile cross-platform framework. The implementation of its cross-platform functionality is based on webview but improved with novel ideas and solutions for better performance. LiteApp dedicates to enable developers to use modern web development technology to build applications on both Android and iOS with a single codebase. More specifically, you can use javascript and modern front-end framework Vue.js to develop mobile apps by using LiteApp, with which, productivity and performance can coexist ,application you build will be running on web with performance close to native. We achieve this by decoupling the render engine from the syntax layer, see more detail below.

PhoneGap - Build amazing mobile apps powered by open web tech

•    Java

Adobe PhoneGap framework is an open source distribution of Cordova. Reuse existing web development skills to quickly make hybrid applications built with HTML, CSS and JavaScript. Building applications for each platform–iPhone, Android, Windows and more–requires different frameworks and languages. PhoneGap solves this by using standards-based web technologies to bridge web applications and mobile devices.

apollo-universal-starter-kit - Apollo 2 Universal Starter Kit — GraphQL React JavaScript app boilerplate for Mobile, Server and Web where code for all platforms built with Webpack to enable max code reuse, stack: Apollo, GraphQL, React 16, React Native, Expo, Express, Knex, SQLite, Twitter Bootstrap, Babel, Webpack

•    Javascript

Apollo Universal Starter Kit is a SEO friendly boilerplate for Universal Mobile and Web app development built on top of Apollo, GraphQL, React 16, React Native, Expo, Redux, Express with SQL storage support, for styling Twitter Bootstrap, NativeBase and Ant Design integration. Hot Code Reload of back end & front end using Webpack and Hot Module Replacement to reflect your changes instantly and help you stay productive. This starter kit adds full React Native integration, with Webpack as a packager and Expo. No native code compilation tools are needed in order to develop native mobile applications with this kit. You are able to run both web and mobile versions of your app at the same time connected to the same backend.

awesome-android - A curated list of awesome Android packages and resources.

A curated list of awesome Android libraries and resources. For general Java libraries have a look at awesome-java. My personal recommendation is (for now) to use the android api to build a native app. Scala can help to build this native apps with cleaner code but it adds to many methods (Multidex required). Kotlin is a modern language with 100% interoperatibility with java projects without multidex. But there are also use cases where alternatives like cross-platform development can be useful.

cocos2d-js - cocos2d-x for JS

•    C++

Cocos2d-JS is Cocos2d-x engine's JavaScript version that includes Cocos2d-html5 and Cocos2d-x JavaScript Bindings. It equips your game with cross-browser and cross-platform abilities, accompanied by full Cocos2d-x features and simplified JavaScript friendly APIs.Cocos2d-JS reinvented workflows for all platforms in v3.0, it provides a consistent development experience for whichever platform you want to distribute to, no matter web and native. "Code once, run everywhere" is incredibly easy and natural in Cocos2d-JS. With one single JavaScript code base, you can run your game on all web browsers and native platforms including Mac OS, Windows, iOS and Android. This will bring your game great opportunities in almost all channels of distribution. On the other hand, if you are only interested in casual games on the web, you can embed directly in your web page the Cocos2d-JS Lite Version which is extremely easy to use and light as a feather.