Some Kraken users have been requesting that it be hosted in a more modern, distributed, version control system. I have moved the Kraken source code from Subversion to Mercurial.
I am hosting it here: https://hg.kearwood.com
In addition, I have mirrored it at Google Code: http://code.google.com/p/kraken-engine/
If you don’t have a Mercurial client and you don’t want to check out from the command line, I’d highly recommend Atlassian SourceTree on the Mac: http://www.sourcetreeapp.com/
For Windows, there is TortoiseHG: http://tortoisehg.bitbucket.org/
Alternately, you can just download a .zip file of the source code using a browser: https://hg.kearwood.com/Kraken/Kraken/archive/tip.zip
Mercurial will make it easier to maintain integrity of a “stable” and “experimental” branch, as the project matures.