What are some alternatives?
Firebase - Firebase is a cloud service designed to power real-time, collaborative applications for mobile and web.
Microsoft Visual Studio - Microsoft Visual Studio is an integrated development environment (IDE) from Microsoft.
Android Studio - Android development environment based on IntelliJ IDEA
IntelliJ IDEA - Capable and Ergonomic IDE for JVM
Adobe AIR - Adobe® AIR® runtime enables developers to package the same code into native apps for Windows and Mac OS desktops, iPhone, iPad, Kindle Fire, Nook Tablet & Android. Buy now.
Xamarin - Create iOS, Android and Mac apps in C#