iPatch 2.1 has been released.

iPatch 2.1 is an utility to compare resources of two applications, and can
produce a self-applying patch to update an older version of an application
to a newer version. It now includes Multi-patch option (you can create a
patch for more than one application) and is now Panther & Jaguar compatible.
You can now patch Carbon Applications and Resources Fork files too.
It supports French, English, German and Japanese localizations. The update
of this 7$ shareware is FREE for all registered users.

Version 2.1 (04.01.2004)
– Fix a bug causing patches not able to be applied on applications.
– Add an option to give a metallized interface to the patch.

All other informations can be found on http://www.ipatch.org