Galleon Software produces the eMerge bulk emailing system for "Classic" Mac OS, which allows you to send email using a facility similar to a word processor's mail merge mechanism. While bulk emailing is something that I strongly disapprove of, there's just no stopping people, and this program is thankfully priced out of range for casual spammers.
Can't find what you're looking for? Try a search:
Also, if you have an older Mac, be sure to check out the "Classic" applications page for more options.
Finally, take a look at ALEMIA if you think you know that name of an application, but aren't quite sure.
No, I don't accept reviews anymore for these older applications. With the creation of this page in the Orchard's late 2005 redesign, I only accept reviews for currently-developed applications that work on Mac OS X (or later....whatever that might be!!).