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.
OneSignal - Customer engagement platform used by over 1 million developers and marketers; the fastest and most reliable way to send mobile and web push notifications, in-app messages, emails, and SMS.
Xcode - Xcode is 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.
Parse - Build applications faster with object and file storage, user authentication, push notifications, dashboard and more out of the box.
Android Studio - Android development environment based on IntelliJ IDEA