I didn't write it but QuickBeg.inc has always been a favorite of mine. Causes your toons to beg for missing buffs that you set in an INI. Can be toon specific or class specific. Then of course setting up your toons to respond to certain keyword phrases (given by approved toon names of course) then your crew can buff itself, even if some are not in the group, or if some evil mob decides to strip buffs off your crew, they can start asking for the buffs. (Buffer can be set to buff during combat or only out of combat, per buff, so you can keep important buffs on X toon) It is a bit of a hassle to set up initially, but once it is in place it works like a champ =D
And of course the Defense.INC file I dreamed up to help with automating defensive measures for tank classes.