simple-currency
SIMPLE-CURRENCY provides conversions between currencies using data published daily by the European Central Bank, no guarantees about the accuracy of the data are given or even implied. For details of the ECB FX rates see: http://www.ecb.int/stats/exchange/eurofxref/html/index.en.html
$ area51 add simple-currencyCopyUsage
;; area51 add updates your .asd automatically.
;; Use the package in your code:
(in-package :my-project)
(simple-currency:some-function ...)