SOUNDS - Discover music with friends
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.
Wohooo.net - Create Your Own Online Radio Station
Upcoming.org - A simple way to share and discover interesting events
Listen2MyRadio - Stop dreaming, start streaming. Free and premium Shoutcast and Icecast audio broadcasting.
Colloq.io - Discover a new way to the conferences you like.