This has now been updated, the current version is available here
Viewfinder Mailing List (VML) is a simple to use, easy to install mailing list manager.
At the moment it only supports plain text emails and one list, but it will allow people to subscribe and unsubscibe automatically, with a validation email if you desire it (to stop people from signing up any old email address). Other features include an archive of sent mails, management of the list of subscribers, the inclusion of default headers and footers and the designation of the ‘from’ email address.
VML is designed primarily for small-medium sized lists.
VML requires PHP and a MySQL database to work.
Update (10/05/05): I have made a change to the admin header file as the previous version would allow you to type in the address of a page in the admin section and gain access to it without a password. Please update any previous copies.
Update (03/01/07): Version 1.0 is available here