Eclipse projects manage their code in Git, CVS, or Subversion (SVN) code repositories. Here is the breakdown by repository. Note that some projects have multiple repositories, and/or use a combination of Git, SVN, and CVS.
Here is the breakdown by project.
CVS has been deprecated and will be retired on December 21/2012. When it is retired, CVS will be made read-only. Eclipse projects are encouraged to start planning their migration to Git.
301 days remain before eclipse.org CVS becomes read-only.