This simple software downloads data from bitcoinaverage.com.

Then it gets import from the console - both local ISO4217 currency code and amount and converts it in reverse into BTC amount using real time data.

For instance you enter AUD (for Australian Dollars) then enter 100 (if you would like to exchange 100AU$ to BTC) and you get the amount of BTC that you should get for 100AU$ with date/time stamp.