Houseparty - Brining empathy to online communication.
Mighty Networks - Mighty Networks enables entrepreneurs, organizations, and companies to create and grow a community-powered brand.
Booyah - Video chat with up to 12 friends at the same time.
Bigtent - BigTent is a web-based organization and communication portal for groups.
Airtime - Hang out with group video, share music & videos
Nabble - Nabble is a forum software that are embeddable and fully customizable with scripting language.