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.
Mighty Networks - Mighty Networks enables entrepreneurs, organizations, and companies to create and grow a community-powered brand.
Morse - Create, shout out, and discover nearby events in real time
Bigtent - BigTent is a web-based organization and communication portal for groups.
Colloq.io - Discover a new way to the conferences you like.
Nabble - Nabble is a forum software that are embeddable and fully customizable with scripting language.