Current Release

v1.1.22.09 - November 11, 2015

Installer - includes everything below for the current stable version.

Binaries (portable zip downloads):

Compiler - Ahk2Exe and other files required to compile scripts.

Offline help file - compiled help file in English.

Source code

Other Releases

AutoHotkey 1.1.* - previously known as AutoHotkey_L.
AutoHotkey 1.0.* - also retroactively known as AutoHotkey Basic, Classic, Vanilla, etc.
AutoHotkey 2.0-a* - see AutoHotkey v2.

Other Downloads

Help files in other languages - these are maintained by other volunteers, so are sometimes out of date.