KeyMacros

Binds keys to macros of up to 1023 characters.

To start using the addon left-click on the minimap button (or use the /keymacros command).
You can also bind a key to execute /keymacros with the addon itself.

All the macros are spec-specific, so you can have different macros for each spec.
On Classic you will need to select your spec first by right-clicking on the minimap button (this is not needed on Retail).

Interaction with vehicles
If you use KeyMacros on the vehicle keys (1, 2, 3, 4, 5, 6), you must add this at the start (with ActionButton1/2/3/4/5/6):
/click [vehicleui][possessbar][overridebar] ActionButton1
/stopmacro [vehicleui][possessbar][overridebar]
<Rest of the macro here>