You can find exchange rates on the links below:
http://www.xe.com/ucc/
http://www.x-rates.com/calculator.html
http://www.bloomberg.com

Also you can find time series of exchange rates at:
http://www.bankofcanada.ca

For the Iranian Rial, you can find the rates at Central Bank of Iran website:
http://www.cbi.ir/ExRates/rates_fa.aspx