Homokaasu Mindstrings is the definitive Internet chat application with extensive mind control features. Here are the commands it recognizes.

Commands

General

/join [room] Joins a room. If the room does not exist, it will be created. To chat in private, just create a room and send the name of the room to your friend.

/clear Clears the chat

Font styles

*text* makes the text appear in bold.
|text| makes the text appear in italics.
_text_ makes the text appear underlined.
Use multiple styles in this order: * | _text_ | * with spaces between format characters and afterward. *text*. will appear in plain text due to the period.

Please note that font styles will not work in Action, Now Playing or private messages.

Special messages

/msg [user] [msg] Sends a private message to user. If the username has spaces, enclose it in quotation marks.
/msg Gasmaster hello dear!
/msg "Space Oddity" Ground control?

/me [action] Sends an Action message.
/me is flambooxled!

/np [song] Sends a Now Playing message.
/np Arcturus - The Chaos Path

/logo [1-100] Sends a custom chat logo. Logos can be managed here.

Ignoring and unignoring

/ignores Lists your current ignores.

/ignore [user] Ignores the specified user.

/unignore [user] Unignores the specified user.

/ignorelogos Toggles the ignore of the chat logos.

/ignoregames Toggles the ignore of the chat games.

Settings

/save Saves the current settings for future chat sessions. Without saving, all changes will be lost when you reload the page.

/mnemonic [0-9] [text] Sets a mnemonic for quick access. To invoke the mnemonic, press Ctrl-#. For example, the command
/mnemonic 1 /quality 2 will set the mnemonic so that when you press Ctrl-1, "/quality 2" will appear in the input text box.

/buffer [10-1000] Sets the message buffer to specified amount of lines

/quality [1,2,3] Sets the display quality. 1 is the highest.

/font [6-24] Sets the font size.

/logoscale [10-100] Sets the display size of the logos. The scale is linear, from 40x10px to 400x100px.

/version Displays the current version of the Chat and of the Flash Player.

TKEP specific

/n00b [user] n00bs a user.

/stats [user] Queries the statistics of the specified user.

/disconnect Disconnects from the chat server (playing TKEP is still possible)

Keyboard shortcuts

Press Control+key to invoke shortcuts

s Private message to the same user as previous private message
m Action message
l Show logo menu
n Now playing
j Join room
i List ignores
r Clear

It seems that some of the shortcuts do not work with IE (which overrides the shortcut keypresses). Too bad, get Mozilla.