Public - Group chats.
VK Live - VK Live is a Live Streaming application by VK for Android and iOS devices.
nocnoc - Instant group chat invite via link
Chums Live - Chums Live a free to use entertainment app developed and published by Intertext and Chat Comms Inc.
Viber Communities - Group chat with up to 1B members, admin controls and more
Nonolive - Broadcasting app for game live streaming.