Signalfire

If you have admin privileges you can manage the room memberships by allowing other people to be admins, inviting new people or blocking people from ever returning to the room. This will allow you to invite people for temporary periods such as a meeting and then remove their membership privileges...

The sidebar includes a list of all the rooms you can access and who is currently in each room. This allows you to keep up with each conversation and quickly toggle between each room...

Signalfire is user-centric, which means means you have memberships to as many chatrooms as you like. For business, you can access the teams of people you work with on different projects or invite a customer to a private chat to discuss compensation...

Signalfire displays the most recent message at the top. Designed this way you'll find that you'll always be focused at the top of page. It's a natural behavior when reading. Each post accepts Textile formatting, displays the user's avatar and about how long ago they posted the message...