You can download Carbon Emacs 22.3 for Mac from our application library for free. The program is included in Developer Tools. This free software for Mac OS X was originally produced by Seiji Zenitani. The most popular version among the program users is 22.3. Commonly, this application's installer has the following filename: CarbonEmacs-Leopard-20100115.dmg.
From the developer:
Carbon Emacs is a Carbon/OS X distribution of GNU Emacs, based on the CVS source code. In order to install, drag the Emacs icon into the Applications folder or anywhere else you would like. This distribution has been developed since 2003, with help from MacEmacs JP project. Feedback will be sent to our mailing list.
You may want to check out more software for Mac, such as Emacs, Carbon Data or Carbon Copy Cloner, which might be related to Carbon Emacs.