I've used the following: * '''Git''' - Little user experience, but see PikiWiki for an unusual Git application. * '''Subversion''' - Helped setting up DevelerCompany's main repository comprising several projects. * '''CVS''' - Managed large project repositories at DevelerCompany and SiriusCompany. * '''RCS''' - Managed large software repositories at SeacCompany. * '''Rational Clearcase''' - I got a degree from "Rational University" for this one. Not joking. * '''Source Safe''' - Listed here because some people think it's a real VCS.