Darwin Wallet is an Android app that enables blind and visually impaired users to quickly recognize paper money. It uses the phone's camera to detect currency denominations for US, UK, Canadian, European Union, Belarusian rubles, and Australian bills. Simply hold the bill in front of the phone's camera and the app will speak its value
Check it out on the Android App Store: https://play.google.com/store/apps/details?id=com.ndu.mobile.darwinwallet&hl=en
Darwin Wallet is licensed under the GPLv2