Fixer.io - Fixer provides a free, simple, and lightweight API for current and historical foreign exchange rates and currency conversion. The API tracks rates published daily by the European Central Bank.
ActTrader - ActTrader - The leading edge of currency trading technology
xChangeApi - Easy to use, free live updated foreign exchange rates API
Money Exchanger - A Dedicated Team Driven By Passion To Support Currency Exchange & Remittance Sector! 🇬🇧
ExchangeRate-API - An easy to use, free & reliable Exchange Rate API trusted by tens of thousands of developers since 2010!
FXPlus - Forex Exchange and Trading