Currency Converter is a Dashboard widget which any serious traveler should not leave their Mac without.
This widget lets you convert simultaneously any amount in four different currencies. Values are regularly updated, that is if you're connected to the internet and Dashboard is working. The widget includes not only the world's most used currencies but also lesser known ones and even legacy currencies such as the French Franc or the Deutsch mark.
To use it, simply select the currencies of your choice from the drop down menus, type in a value and let the widget do its job. If you're converting from one currency to another you probably won't need the four entries made available though. Currency Converter goes up to a precision of five decimals and can also calculate taxes, if you include them. On a side note, Currency Converter also includes a number of different themes to choose from.
Currency Converter is a useful widget to precisely convert to any currency in the world. Fills in a gap oddly left out by Apple. A must have for your Dashboard.