Convert currency without Internet with XE Currency for Android - gHacks Tech News
Currency converter | Drupal.org
Currency Converter - Python Project with Source Code - DataFlair
GitHub - tirupati17/currency-converter-swift3.0-viper: Calculates money quick and easy way to see live foreign exchange rates (Based on swift 4.2, viper architecture and special thanks to https://github.com/hakanensari/fixer-io for conversion API)