Source Code
From Reia
The Reia sources are located in Reia's git repository at GitHub.
The following command line command will do the job:
git clone git://github.com/tarcieri/reia.git
You must have git installed first on your computer. Ubuntu Linux users can install git with this command:
sudo apt-get install git-core
NOTE: The git package in Debian/Ubuntu is for GNU Interactive Tools a set of text utilities for the command line.
You can follow this other guides for installing git on Mac OS X and Windows:

