Public - Group chats.
Bunches - Start and discover free or paid group chats about anything
nocnoc - Instant group chat invite via link
Yahoo - News, email and search are just the beginning. Discover more every day. Find your yodel.
Viber Communities - Group chat with up to 1B members, admin controls and more
chitchat - Chat Room with Selfies and Pagers (yes, pagers!)