InviteMe is a super simple auto invite mod that I've been using since before Burning Crusade and figured I'd release it as people have been asking for a quick simple and small auto invite mod. It has options for invites based on being in range, or any range. Also has the ability to configure the invite phrase and saves the variable as well. Keying in /im or /inviteme in game will show you the commands available.

Commands:
/im on
/im off

To turn the mod on and off.

/im passcode INVITE

This will set your new "phrase" to INVITE so that when someone sends you a tell with the word INVITE in it they'll be auto invited to your raid/group.

/whisper Striph invite please!
/whisper Striph invite
/whisper Striph inviteinviteinviteinviteinviteinvite

Are all valid forms now.

*NEW*
/im promotecode PROMOTE

This will set your promotecode whisper to PROMOTE, if someone whispers you with the word PROMOTE it will promote them to a raid assistant (only works if your in a raid and the raid leader).

/whisper Striph promote

Will promote you to a raid assistant.