With Bastion for EC3 you can send messages, create groups and share all kind of documents, videos and high-quality photos with all your colleagues.

You can create groups (chatrooms) and invite your colleagues from your contacts to join you in your chatrooms, or simply open direct chats with your colleagues.
You can send messages and multimedia content to all participants of a chatroom.
You can also share your location with your colleagues (continued use of GPS running in the background can dramatically decrease battery life).