From Currency Converter:
Exchange Rate is a free desktop currency converter for the PC which runs from the system tray icon. It supports more than 100 currencies and retrieves the latest rates over an active internet connection. The interface is attractive and easy to use.The file download size is somewhat larger than what we would have liked it due to the Microsoft .net 4 client framework installer being included. Once installed however Exchange Rate takes up very little system resources. We are confident you will find it a pleasure to use.