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

Mighty Networks - Mighty Networks enables entrepreneurs, organizations, and companies to create and grow a community-powered brand.

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

Nabble - Nabble is a forum software that are embeddable and fully customizable with scripting language.

MisterJack - Make and share playlists

Bigtent - BigTent is a web-based organization and communication portal for groups.