Aquamacs Emacs 2.4 (Mac)

Aquamacs is a Mac-like distribution of the powerful Emacs text editor. It looks and behaves like a Mac program - even though it's still GNU Emacs with all the extensibility that millions have come to appreciate.Emacs is a text editor of legendary power and configurability, but it also has an enormously complex interface. Aquamacs tames the Emacs tiger: you get Apple shortcuts (in addition to the Emacs ones), nice fonts, one file per window (if wanted), international input methods, Apple Help manuals and more. Aquamacs comes with a range of modes for various markup and programming languages: HTML, C/C , Java, Python, Perl, AppleScript, Tcl, XML, R (S)... These modes have extra functions for the languages, including excellent syntax highlighting. You can even use Aquamacs to read news and e-mail, just like any Emacs.