Some commands like irc?

Hello,
Playing with chatroom, yesterday I discover some useful commands that you can input from the chat.
for example:
/ban/user/test, the user test will be banned from chat.
/kick/user/test, the user test will be kicked from chat.
I have 2 questions:
1. Do you know other similar commands?
2. There are 3 commands that I'd like to have.... if possible!
/unban, /unkick, /who.
Especially the /who, should print a simple list of online users.
Is it possible?
Still thank you.