JUniversal

A new, Java-based approach to cross-platform mobile apps (used by Google Inbox and Google Spreadsheets)

19 Alternatives To JUniversal

Create React Native App

Create a React Native app on any OS with no build config

KDevelop

KDevelop is a free, open source IDE (Integrated Development Environment) for Linux, Solaris, FreeBSD, Mac OS X and other Unix flavors.

NativeBase

Experience the awesomeness of React Native without the pain
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Qt Creator

Qt Creator is a cross-platform C++, JavaScript and QML integrated development environment. It is the fastest, easiest and most fun experience a C++ developer could wish for.

RIBs

Build cross-platform apps that have similar architecture, enabling iOS and Android teams to cross-review business logic code (by Uber)
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Vue Native

A framework to build Native Mobile apps using JavaScript.
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Xcode

Xcode 4 is the new version of Apple’s powerful integrated development environment for creating great apps for Mac, iPhone, and iPad. Xcode 4 includes the Xcode IDE, instruments, iOS Simulator, and the latest Mac OS X and iOS SDKs.