The latest release is 0.5.5:
Download via corsix.org

The latest download link will come with a copy of this website, however it may not always be up to date. The latest downloadable documentation is 30-mar-08 (packaged with version 0.5.5):
Download from corsix.org

The tool is open source, so you can download the C++ source code for it if you wish:
0.5.5 source code
0.5.4 source code
0.5.3 source code
Older versions (up to 0.3.9) available upon request from [email protected].

This documentation is provided under the GNU General Public License. All trademarks / copyrights are tm/r/c their respective owners.