These repositories are used primarily for school projects and whatever I'm working on, the subversion repository are no longer being maintained.
Here's how you checkout a project anonymously over http: git clone http://neo2k.dk/git/project
Keep in mind, not all the repos may be clonable from http, if they're not you can grab a tarball (snapshot).
If you want a repository for the site, I might be able to help you if I trust you, access is usually gained through ssh.