Wikipedia
GroupSpaces
GroupSpaces (styled groupspaces) is a London-based online company that provides technology to help real-world clubs, societies, associations and other groups manage their membership and activities, and promote themselves online. Founded by Oxford University students David Langer and Andy Young, the company was launched in the United Kingdom in 2007 and has since expanded into the United States and over 30 other countries. As of November 2010, its software is used to host over 1 million memberships.