Downloading MailTuner 1.0 for Mac from our website was free. The program relates to Business Tools. This free Mac application is an intellectual property of If Then Software.
From the developer:
MailTuner is a new utility that can fix the slowdown that users may see if they have a large number of contacts in the Mac OS X Address Book. This can slow down the built-in Mail program and cause the message "Adding contact to address book" to appear most of the time. MailTuner compresses the address book and forces it to update the address index.
You may want to check out more Mac applications, such as Onepoint Project, Open ERP or Teamwork, which might be similar to MailTuner.