@MailMan@
http://www.planet-plg.com/programming/perl/mailman.html
Rob's Mass Mail
http://tdi.uregina.ca/~eislerr/cgi/massmail/index.html
Mail Machine
http://www.mikesworld.net
I-web Mailman
http://www.interactive-web.net/mailman.html
Mlist
http://www.vanabel.com/dvadnld.html