Firebase - Firebase is a cloud service designed to power real-time, collaborative applications for mobile and web.
MongoDB - MongoDB (from "humongous") is a scalable, high-performance NoSQL database.
Android Studio - Android development environment based on IntelliJ IDEA
Brilliant Database - Create a personal or business desktop database fast and easily using this simple all-in-one database software. Free 30 day trial.
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.
CouchBase - Document-Oriented NoSQL Database