Moneychanger's Companion Volume 1

From Introduction:

While having three or four different types of coins in a fantasy role playing game may seem suitable enough as far as figuring up the costs of this and that such a slim variety seems rather bland. With all the different cultures and intelligent races that inhabit the fantasy realm why should such individuals merely settle for a simple, universal system of currency. In this edition of the moneychanger’s companion we will look at a wide variety of coinage that can be easily added to your fantasy campaign realm.