Aquamacs 3.6 for Mac was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The application's installer is commonly called aquamacs-emacs-3.2.dmg, aquamacs-emacs-2.5.dmg or aquamacs-emacs-2.4-ub.dmg etc.
This free software for Mac OS X was originally developed by Free Software Foundation, Inc. The program is sometimes referred to as "Aquamacs Emacs". The most popular versions of the application are 3.2, 3.0 and 2.5. Aquamacs for Mac relates to Developer Tools. This free app is suitable for Mac OS X 10.6.0 or later. The unique identifier for this app's bundle is org.gnu.Aquamacs. We recommend checking the downloaded files with any free antivirus.
From the developer:
Aquamacs is an Aqua-native build of the powerful Emacs text editor. By "Aqua-native," we mean more than just the fact that this version of Emacs runs as a standard OS X application. Aquamacs features extensive customization: it will feel and behave mostly like an Aqua program - while still being a real GNU Emacs with all the ergonomy and extensibility you've come to expect from this world-class editor.
You may want to check out more Mac applications, such as Free Time Tracker - Timing lite, which might be related to Aquamacs.