Flutter is Google’s mobile UI framework for crafting high-quality native interfaces on iOS and Android in record time. Flutter works with existing code, is used by developers and organizations around the world, and is free and open source.

fastlane is the tool to release your iOS and Android app.
It handles all tedious tasks, like generating screenshots, dealing with code signing, and releasing your application.

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.

Ace = JavaScript + Native UI + iOS + Android
for Apache Cordova

Add native power to your shared JavaScript codebase
Works with Ionic, PhoneGap, and all Cordova-based projects

Include the Crosswalk Project web runtime with your hybrid Android or Cordova / PhoneGap app, and users will consistently see it through a predictable, powerful WebView based on Google Chromium.

The Crosswalk Project Advantage:

Get consistent, predictable behavior by reducing Android device fragmentation.
Use the latest web innovations and APIs. Provide a feature rich experience on all Android 4.0+ devices.
Easily debug with Chrome DevTools.
Improve the performance of your HTML, CSS, and JavaScript.

Semantic Scuttle android client.

The faster Android emulator
Genymotion is the next generation of the AndroVM open source project, already trusted by 450,000 developers.
It’s even easier to use and has lots more functionalities.

Welcome to the open-source Codepath Android Cliffnotes! Our goal is to become the central crowdsourced resource for complete and up-to-date Android content and tutorials.