Just now my friend informed me ingame that she had been *very* kindly helped by two players. I told her to inform the guys that if they ever wanted help, they could just ask anyone of my guild for assistance.
However, most guildies of mine won't know who these people are. So, what I'm looking for is an addon that makes a global list for the guild that people can maintain together of people who have helped my guildies and deserve some extra friendlyness when anyone sees them around.
A friend of mine has an addon "vanasKOS" (kill on sight) that helps him maintain a list of people he has a grudge against. He doesn't really use it that much anymore because we're on a PvE server, but the general idea is the same. (Except for the list not being shared).