Shoestring although still in development, is a peer to peer payment application that integrates international payments no matter where you are in the world.

Gatsby source plugin for Exchange Rates API

This is an Exchange Rates App for converting currencies

Foreign Exchange Currency App

CurrenSee is a user-friendly React app that enables easy currency conversion, historical rate visualization, and personalized watchlists and widgets for currency tracking.

Javascript client for exchangeratesapi.io