Mighty Networks - Mighty Networks enables entrepreneurs, organizations, and companies to create and grow a community-powered brand.
Meta Search - Search your Desktop, Google Drive, Dropbox, Gmail, Evernote.
Bigtent - BigTent is a web-based organization and communication portal for groups.
Community Box - Easily create beautiful directories
Nabble - Nabble is a forum software that are embeddable and fully customizable with scripting language.
SpaceWorks - The easiest way to build a website for your community.