FAXstf X Pro is the solution more Mac users rely on than any other fax program. Designed for people that want to send and receive faxes from their computer whether they send an occasional fax or hundreds a day. FAXstf X Pro gives users everything they need to send, receive, and manage faxes from any application.
Version 10.9 adds support for Mac OS X 10.5.
Mac OS X 10.3.9 or later
*Previously available here