A small, simple AddOn that provides textual feedback when a character gains or spends money, via the chat pane.
You no longer need to wonder exactly how much you just spent on those 14 items you just bought from the merchant, or how much you looted from a corpse (whilst ungrouped), as it's right there for you to see!
Well thats what it does... but it just displays in Yellow Letters.
I believe you already have this. Coins. I haven't released Coins separately, but it's an addon I developed to be my primary example addon for developing with Ace. You can actually download it individually. It's linked here: http://wowace.com/forums/viewtopic.php?t=220