SciTE4AutoIt3 is a specialist editor package based around the excellent SciTE editor. The editor has been set up to compile AutoIt scripts. SciTE has been extended with a multitude of lua scripts. SciTE4AutoIt3 may be downloaded here: SciTE4AutoIt3
SciTE4AutoIt3 comes with a configuration program named SciTEConfig. With SciTEConfig a user may change the color scheme of SciTE. One may also change the default au3 double click action from edit to run. Also available are calltips, abbreviations, and quick access to the helpfile. Too access the helpfile the user may simply highlight the function or constant name in the editor and press Alt + F1. This will bring up the help file opened on the relevant page.