From Canadian Mind Products
Currency Conversion Applet.
CurrCon is an Applet you embed in your HTML to display prices in a variety of world currencies defaulting to the user's country.
It usually works in conjunction with the html macros pre-processor to insert the necessary Applet calls, though you can do it manually.
Shareware for non military use only.
Registrants get help setting it up.
Requires Java 1.5+