afk - /afk,/away - Marks you as "Away From Keyboard".
announce - /announce,/ann - Toggle channel announcements.
ban - Bans a user from a user-created chat channel.
battleground - /battleground,/bg - Sends a chat message to your battleground.
csay - /c,/csay - Sends chat text to a channel.
chatinvite - /cinvite,/chatinvite - Invite a user to a user-created chat channel.
chatlist - /chatlist,/chatwho,/chatinfo - Displays a list of users in a chat channel, or what channels you are currently a member of.
chatlog - Enables/disables chat logging.
combatlog - Enables/disables combat logging.
chathelp - /chat,/chathelp - Displays a list of commonly used chat commands.
ckick - Kicks a user from a user-created chat channel.
emote - /emote,/em,/e,/me - Perform an emote with the given text.
dnd - /dnd,/busy - Marks you as "Do Not Disturb".
guild - /guild,/g,/gc - Sends a chat message to your guild.
join - /join,/channel,/chan - Joins or creates a user-created chat channel.
leave - /leave,/chatleave,/chatexit - Leaves a user-created chat channel.
moderator - /mod,/moderator - Sets moderation in a user-created chat channel.
mute - /mute,/squelch,/unvoice - Prevents a user from speaking (voice or text) in a user-created chat channel.
officer - /officer,/o,/osay - Sends a chat message to your guild's officer channel.
owner - Displays or changes the owner of a user-created chat channel.
password - /password,/pass - Sets or removes a password on a user-created chat channel.
party - /party,/p - Sends a chat message to your party.
raid - /raid,/rsay - Sends a chat message to your raid.
raidwarning - /raidwarning,/rw - Sends a raid warning to your raid.
reply - /r,/reply - Replies to the last user to send you a whisper with a message.
resetchat - /resetchat - Resets chat settings to default.
say - /say,/s - Sends a chat message to players in your immediate local area.
unban - Unbans a user from a user-created chat channel.
unmoderator - /unmod,/unmoderator - Removes moderation from a user-created chat channel.
unmute - /unmute,/unsquelch,/voice - Allows a user to speak (voice or text) in a user-created chat channel.
whisper - /whisper,/w,/tell,/t,/send - Sends a private chat message to a player in a whisper.
yell - /yell,/y,/sh,/shout - Sends a chat message to all players in your zone.
Combat commands
cancelaura - Cancels (turns off) an aura you have.
cancelqueuedspell - /cancelqueuedspell,/cqs - Cancels casting of the spell you have in the queue.
cancelform - Cancels your current shapeshift form.
cast - /cast,/spell,/use - Uses the given item or casts the given spell.
castglyph - Activates a glyph.
castrandom - /castrandom,/userandom - Casts a random spell from the given list.
castsequence - Casts the given spells in sequential order.
changeactionbar - Changes your current action bar page.
duel - Challenge another player to a duel
forfeit - /forfeit,/yield,/concede - Forfeit a duel.
pvp - Sets whether or not you are attackable by other players.
startattack - Turns on auto-attack.
stopattack - Turns off auto-attack.
stopcasting - Stops casting or channeling.
swapactionbar - Swaps between two given action bars.
System commands
console - Allows user to view or change global client-side options, or perform certain system commands.
click - Simulate a mouse click on a button.
disableaddons - Disables all addons and reloads the UI.
dump - Displays the value of a given variable.
enableaddons - Enables all addons and reloads the UI.
eventtrace - /eventtrace,/etrace - Allows the user to trace events in-game.
framestack - /framestack,/fstack - Allows the user to see all frames under the cursor.
help - /h,/help,/? - Displays a help message with some basic commands.
logout - /camp,/logout - Logs your character out of the game, back to the character selection screen.
macrohelp - Displays a help message with basic information about creating and using macros.
played - Displays information about your character's time logged in.
quit - /quit,/exit - Exits the game.
random - /random,/rand,/rnd,/roll - Generates a random number from 1 to 100. "/random X" rolls a number from 1 to X, "/random X Y" rolls a number from X though Y.
reload - Reloads the User Interface.
script - /script,/run - Runs a block of LUA code.
stopmacro - Stop processing the current macro.
time - Displays the current time
timetest - Used for benchmarking, also shows FPS.
who - Shows you a list of people matching filtering options.
Targeting functions
assist - /assist,/a - Targets a player's target.
clearfocus - Clears the current focus target.
cleartarget - Clears the current target.
focus - Set a focus target
target - /target,/tar - Target the given unit by name.
targetenemy - Target the given hostile unit by name.
targetenemyplayer - Target the given hostile player by name.
targetexact - Target the unit by exact name match.
targetfriend - Target the friendly unit by name.
targetfriendplayer - Target the friendly player by name.
targetlastenemy - Target the last attackable unit you had selected.
targetlastfriend - Target the last friendly unit you had selected.
targetlasttarget - Target the target of the last unit you had selected.
targetparty - Target a party member by name.
targetraid - Target a raid member by name.
Metacommands
show - Affects the button's icon on the Action Bar.
showtooltip - tooltip - Affects the button's icon and tooltip on the Action Bar.
showcooldown - Affects the button's cooldown display on the Action Bar. (not a real command, this executes as "#show")