Modkit

Modkit is a web-based graphical programing environment that allows you to drag and drop blocks of code to create programs for physical devices without worrying about making syntax errors.

It uses an interface which was heavily inspired by Scratch and built using HTML5 web standards. Since the programming environment is internet based, all your work will be saved online, and available from any computer you use. To use Modkit first you’ll need a Mac, Windows, or Linux computer.