KExchange is a currency converter for over 150 currencies using up-to-date
exchange rates from the PACIFIC Exchange Rate Service.

Features

    * rates may be refreshed on command or automatically on startup;

    * rates can be cached locally for offline use;

    * may also be used as a Euro converter; and

    * has an DCOP interface. 

WWW: http://www.favorin.com/projects/kexchange/