CVS
http://www.cvshome.org>
BitKeeper
http://www.bitmover.com/bitkeeper>
PRCS
http://prcs.sourceforge.net>
aegis
http://www.canb.auug.org.au/~millerp/aegis/aegis.html>
subversion
http://subversion.tigris.org/>
General Information
http://www.cmtoday.com/yp/configuration_management.html>
news group
news://comp.software.config-mgmt>