$ uname OpenBSD $ cvs -v Concurrent Versions System (CVS) 1.11.1p1 (client/serve...

  $ uname
  OpenBSD
  $ cvs -v

  Concurrent Versions System (CVS) 1.11.1p1 (client/server)

  Copyright (c) 1989-2001 Brian Berliner, david d `zoo' zuhn, 
                          Jeff Polk, and other authors

  CVS may be copied only under the terms of the GNU General Public License,
  a copy of which can be found with the CVS distribution kit.

  Specify the --help option for further information about CVS

Unfortunately CVS isn't the only GPL-licensed piece of software in OpenBSD. But slowly, one by one, these things seem to get replaced with free and better alternatives. I can imagine a future in which we're free of GPL tentacles.