If FAXstf X, Smith Micro’s fax software for Mac OS X isn’t your cup of tea, you may want to give Cocoa eFax [1.0MB, MacBinary] a try.
This freeware Cocoa front end to the Unix tool, efax — which is not connected with the eFax online faxing Web site — lets you send and receive faxes. To view faxes you can use any application that displays TIFF files. Future versions will convert received faxes to PDF files.
The latest version of Cocoa eFax was written and tested under MacOS X 10.1.2. However, note that the program is still in active development, and could contain some bugs.
Cocoa eFax supports all fax modems (but has only tested on the Apple internal modem) and handles automatic reception of faxes after one ring of the phone. It also sends an automatic e-mail sent to you saying you have a fax — and the fax is included as an attachment.