The "blessed" IzPack repository is available from https://xircles.codehaus.org/projects/izpack/repos/primary/repo
The following is a list of official IzPack developers forks:
The following is a list of forks from various people around the globe (do not hesitate to add yourself here):
A quick and efficient way to collaborate with an IzPack developer that has a repository on GitHub is to:
Pull requests on GitHub are really useful as they make code reviews painless!
Funny tip if you are a Subversion fanatic: GitHub repositories can be accessed read-only from Subversion.
A complete Git conversion of the old Subversion repository can be found at http://github.com/jponge/izpack-full-svn-history-copy (keep in mind that because it is based on the full repository, there are no branches and tags informations, just a linear branch which maps the Subversion revisions).
IzPack first used CVS, then switch in 2004 to Subversion. It switched again, this time to Git, in 2010.