An open-source mailing list archiver. It includes an integrated search engine and supports MIME, GPG, and chronological threading. Designed for large archives.
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]
Manage and control e-mail lists, newsletters, discussion groups and direct e-mail marketing campaigns. Free version available for non-profit organizations. Multiple platforms.