To download these repositories, get Mercurial and then type something like:
hg clone http://techn.ocracy.org/repository-name/
You can also click the "zip" or "gz" links to get an archive of the latest revision without installing anything.
The change logs of the repositories are aggregated at techn.ocracy.org/planet.
We have also some darcs repositories at techn.ocracy.org/darcs.