You can get an overview of and download-links for the re-motion binaries on the

• re-motion community website
  or here, directly on the
• re-motion web-site

As explained in the comments, you need an older version (1.13.6) for working with the PhoneBook tutorial.

As for the re-motion sources, you get them from this subversion repository

You can get a Subversion itself here: http://subversion.tigris.org/

See also

• Building re-motion