Heartbeat - Listen to music with your friends together, on Spotify
slack-fm - Self-hosted service to sync Last.fm with your Slack status
Liyo - Stream your favorite music live with friends 🎶
Slack Status Icons - A custom set of status emojis for Slack
Festify - Festify is a free Spotify-powered app that lets your guests choose which music should be played...
JQBX - turntable.fm for spotify