Download of MailMergeApp 1.6 for Mac was on the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The bundle identifier for this app is com.objectivelabs.MailMergeApp.
The application's installation file is generally known as MailMergeApp154.zip. The following versions: 1.6 and 1.5 are the most frequently downloaded ones by the program users. This Mac application is an intellectual property of Objectivelabs. Please check the Mac app with an antivirus before launch as it is downloaded from the developer's website, and we cannot ensure that it is safe. MailMergeApp for Mac lies within Communication Tools, more precisely E-mail.
From the developer:
MailMergeApp is an AppleScript Studio application that makes it amazingly simple to create 'merged' mailings using the built in Address Book and Email programs in Mac OS X. The single greatest thing about this application is that it uses the Mac OS X Address Book as your contact list, so if you use address book your mail list is already complete.
You may want to check out more Mac applications, such as Zimbra Toaster, PageSender or EEAO, which might be similar to MailMergeApp.