Mopidy - An alternative plug-in based implementation of Music Player Daemon is able to stream from Spotify with an extension.MellowPlayer - A free, open source and cross-platform desktop application that runs web-based music streaming services in its own window and provides integration with your desktop.
It enables applications to use Spotify's service (streaming), without using the official closed-source libspotify. Librespot - An open source client library for Spotify.Note: All clients listed here require a Premium account to stream from Spotify.
