CVS

Setup Instructions Vladan referenced:
http://home.wanadoo.nl/cwdegier/cvs.html

Official(?) CVS:
http://ximbiot.com/cvs/wiki/CVS%20FAQ

Dead Fish (good PDF description):
http://www.drydeadfish.co.uk/junk/cvs/index.php

Default port is 2401

CVS Client Software

http://www.tortoisecvs.org/ - Tortoise CVS (integration into Windows Explorer)

http://www.syntevo.com/smartcvs/download.html - Smart CVS