I hope everyone has seen the very beautiful Spotify Box ( http://blog.zenona.com/. Too bad the project died (or so it seems).
I’m building my own, so I made some NFC integration for Volumio. Code and instructions at https://github.com/ways/volumio-nfc. Feel free to comment.
Build log / instructions: https://0p.no/2017/12/19/volumio_nfc_build.html