Freshmeat page: http://www.freshmeat.net/appindex/1998/06/19/898284402.html
Listar is a GPL'd mailing list managment software designed to be HIGHLY extensible and flexible. It has been under development for about 2.5 years now and I've been involved with it for 2 years of that as co-developer with Jeremy Blackman.
This project has the following developers:
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