EON is released under the BSD License.
The EIGEN library, which is included with EON, is released under the Mozilla Public License.
A read-only copy of the code can be anonymously checked out of the subversion repository with the following command:
svn co https://theory.cm.utexas.edu/svn/eon
If you are a developer you can checkout the code using the command:
svn co svn+ssh://username@theory.cm.utexas.edu/svn/eon
This will fetch a copy of the latest code to a local directory named eon. For more information on subversion read its online documentation.
The eon code can also be download directly at tarfile..