The following Editors are either commercial or have licenses or space requirements that prevent TUG from including them directly in the MacTeX distribution. Webloc files are included for each of them.

BBEdit - commercial - BareBones Software - Scripts (included with MacTeX) adapt BBEdit to LaTeX use.
TextWrangler - free - BareBones Software - Script (included with MacTeX) adapt TextWrangler to LaTeX use.
TextMate - commercial - Macromates - Built-in LaTeX Mode.
