The sounds in EQ must have come from some sort of sound-library or something as they appear in a few other games...
Ding (Mario):
http://www.youtube.com/watch?v=5c11dzzFZLU
Commons howling noise (Daggerfall):
http://www.youtube.com/watch?v=QIyuPDx9Wls#t=0m55
Outdoor birds (Daggerfall):
http://www.youtube.com/watch?v=QIyuPDx9Wls#t=1m05
Rats (daggerfall):
http://www.youtube.com/watch?v=QIyuPDx9Wls#t=1m07
Quest turnin (Arena):
http://www.youtube.com/watch?v=DPhihexyZmI#t=4m08
Also, Quake ogre sound in Daggerfall:
http://www.youtube.com/watch?v=QIyuPDx9Wls#t=1m25
Anyone know of any more examples?