Ecartis is a powerful mailing list manager in the tradition of listserv but with an open architecture and free source (GPL license). It has some features not found in Majordomo. One of the most interesting things in Ecartis is plugin module system; many functions are implemented as dynamically-loadable modules. . You may also want to check out the ecartis-cgi program, which provides a web-based front-end for your Ecartis mailing lists.
