The open-source Arduino Software (IDE) makes it easy to write code and
upload it to the board. It runs on Windows, Mac OS X, and Linux. The
environment is written in Java and based on Processing and other
open-source software.  This software can be used with any Arduino
board.

NOTE: This script compiles everything from source. Compared to the
binary version, it will take longer and require almost 1GB of free
space.