Shared Spotify - Find the common songs you have between friends
Songlink - Share music with anyone.
Bands on a Budget - Economical SWAG meant for bands, often hijacked by startups
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!
Graphviz - Graphviz is open source graph visualization software. It has several main graph layout programs.
Cymbal - Music discovery powered by friends