“Apple's Font Tools 3.0 is a suite of command-line font utilities for developers. This release has been updated for Mac OS X 10.4 and adds the ftxdumpfond and ftxfusefond utilities. It comes as a single installer package and includes a PDF manual, Quick Start, and tutorial.”

http://developer.apple.com/fonts/OSXTools.html

Not for the feint of heart, as you can do some serious damage to your System with command line tools. The tool descriptions are intriguing though…

Bill