Hi Norm,
short answer: every version control system supported by Eclipse (or having an Eclipse plugin) :-)
You can use the Eclipse marketplace (menu Help > Eclipse marketplace) to search for plugins.
Git: yes, e.g eGit
SVN: yes, e.g. Subversive
CVS: yes, e.g. CVS version tree
ClearCase: yes, e.g. CodeCollaborator
Usually you find multiple plugins for each version control system.
Erich