/on : shows how many players are on.
/happy <1-6> : shows the number of happiness.
/1-6 <text> : directs the text to one of the chat tabs.
/ignore <nickname> : to ignore players.
/friend <nickname> : to add a player as a friend.
/me : sends chat to local.
there might be even more commands as even hexy didnt mention those lol .