klaep - music collaboration - klaep is a social music collaboration network for musicians

Calendify - Calendify is an event community where you can share, publish, and subscribe to event calendars. It helps you to stay informed about what you are interested in and what is yet to come.

Madsounds - It’s like Discover Weekly, but daily.

Upcoming.org - A simple way to share and discover interesting events

MisterJack - Make and share playlists

Morse - Create, shout out, and discover nearby events in real time