Shared Spotify - Find the common songs you have between friends
Songlink - Share music with anyone.
Playlist Souffle - Swap Spotify playlist tracks based on album or artist
humit - A social networking app for music sharing and discovery.
aux.app - A free web-based music platform to play music from other popular online streaming services.
Carbon for Slack V2 - This is Carbon for Slack.It integrates the core functionality of carbon-app into a Slack bot and makes it possible for you to create and share beautiful images of your code directly with your teammates in Slack!