[logn]

I can't speak for them, but I think if you're not sold on git/mercurial then you have CVS and SVN as obvious choices. And those two aren't that different (pros/cons explained: http://www.pushok.com/software/svn-vscvs.html ... edit: that's a very old link)

[Grue3]

Contains stuff like "SVN not yet so widly used, as the result there are places where it support still not implemented."

Very old indeed.