LWGate  
   CGI script, which tries to merge the technologies of the WWW and mailing lists [Perl]
   http://www.netspace.org/~dwb/lwgate/

ListProc  
   Miling list software [Unix]
   http://www.listproc.net/

Arrow  
   A list server that allows a user to manage interactive mailing list discussions on a PC. [Windows]
   http://www.jadebox.com/arrow/

Mailman  
   Software to manage email discussion lists. It gives each mailing list a web page, and gives users options such as subscribe and unsubscribe over the web [Unix]
   http://www.list.org/

ListSTAR  
   Discussion lists, newsletters, email on demand [Mac]
   http://www.liststar.com/

eSquire  
   Web-based system. Features autoresponders, integrated support for MHonArc and HyperMail as well as Banned user support.
   http://www.gamerz.net/esquire/

Dada Mail  
   Easy to use open source mailing list management software which operates on any web server that uses CGI scripts. Formerly called Mojo Mail.
   http://mojo.skazat.com

JergoBlatz  
   Play-By-E-Mail mailing-list server. Automates turn-based games such as VGA Planets and provides a forum for the players of those games. It has an immediate mode which allows games such as tic-tac-toe and rock-paper-scissors to be played without waiting fo
   http://www.cc.utah.edu/~nb3367/

Ecartis  
   Open source GNU mailing list management software. It has a many similarities to Listserv which was one of its inspirations. [Unix]
   http://www.ecartis.org/

Macjordomo  
   Macintosh based list server. It can be used in combination with any POP3/SMTP server [Mac]
   http://macjordomo.med.cornell.edu/

LI-LI-S  
   Open source project. [Linux]
   http://lilis.sourceforge.net/

TinyList  
   A mail list manager written as a suite of modules. [Perl]
   http://www.tinylist.org/

Indexsoft Intuitive Mailer  
   A mailing list manager [Perl]
   http://www.indexsoft.com/intuitive/

MailList Controller  
   Designed to send out personalized messages, manage multiple mailing lists, newsletters, campaigns, e-zines, announcements, support and group mails.
   http://arclab.com/products/amlc/index.html

AML - Adaptive Mailing List  
   Eliminates duplicate deliveries through multiple lists. Advanced moderation features. Sends email in rich HTML form. Adapts to the subscriber's mail client configuration. Public (to list) and private replies supported. [Windows]
   http://www.commtact.com/AML/

DOLIST  
   Stand alone mailing list server software.[Windows]
   http://software.dolist.net/

EZMLM  
   High-speed mailing list manager for qmail. Lets users set up their own mailing lists within qmail's address hierarchy.
   http://cr.yp.to/ezmlm.html

LISTSERV  
   Manage and control e-mail lists, newsletters, discussion groups and direct e-mail marketing campaigns. Free version available for non-profit organizations. Multiple platforms.
   http://www.lsoft.com/products/default.asp?item=listserv

Mailgust  
   A mailing list manager, newsletter distribution tool, and message board system [PHP]
   http://www.mailgust.org/

Advanced Maillist Verify (AMV)  
   Verifies the validity of emails in databases, address books and mailing lists the email server addresses are extracted from the DNS. Supports the Socks5 proxy protocol, for use within a local area network (LAN). [Win 95/98/Me/NT/2000]
   http://www.mailutilities.com/amv/

eMailer2001  
   Manages mailing lists, their members and has templates for pre-written messages and filters for the automatic processes. Includes a scheduler and spam checker.
   http://www.emailer2001.com/