Cocorate.com - Online currency and cryptocurrencies exchange rates calculator helps you convert anything in real-time.
Flip - Currency Converter - Flip is a simple and easy-to-use currency & exchange rate converter.
CurrencyScoop - Developer-friendly REST API with real-time and historical currency exchange rates for world currencies and cryptocurrencies.
Denomination - Currency converter that tells you the change you need for that conversion
xCurrency - Smart Currency - A simple ads-free currency converter.
XE.com - XE.com Inc. (XE) is a Canadian online foreign exchange services company.