[1.2.4] Single Player Commands v3.2.1

achievement - Allows you to list or unlock all achievements
alias {ARGS} - Allows you to assign an alias to one or more words
ascend - Moves you to the next platform above your position
biome - Tells you what biome you are currently in
bind {COMMANDPARAMS} - Binds a command to a keyboard button.
bindid {ARGS} - Binds a command to a keyboard key using the key id
binditem - Binds a mouse button to a command when the specified item is in hand
bring [ENTITY] - Brings the specified entity to you.
cannon [STRENGTH] - Shoots a primed TNT in the direction you are pointing.
calc - Calculator command
chest - Allow access of chests
clear - Clears the console
clearwater - Toggles water clarity on/off
climb - Allows the player to climb any surface without a ladder
clone [QUANTITY] - Clones the NPC which you are looking at
config - Allows you to set the global configuration file as your current configuration
confusesuicide - Makes mobs attack one another
creeper - Enables or disables creeper explosions
criticalhit [enable|disable] - Allows you to turn critical hits always on/off
clouds [enable|disable] - Allows you to turn clouds on/off via command
cyclepainting - Cycles through the painting which you are pointing at
damage - Turns player damage on/off
defuse [all] - Defuses any TNT nearby which has been hit, drops 1 tnt in its place
descend - Moves you to the next platform below your position
destroy [all] - Destroys the current item
difficulty - Sets the difficulty to the specified level (0-3)
drops - Turns item drops on/off, having them turned off will make the game run a little bit faster, and also stop your inventory from filling.
dropstore - This command transfers everything in your inventory into a chest that it creates next to you.
duplicate [all] - Duplicates and drops the currently selected item stack
effect - Configures potion effects on the player
enchant - Enchants the currently selected item
enderman pickup [enable|disable] - Enderman command to enable/disable block pickup
explode [SIZE] - Sets off an explosion in your current location.
exterminate [SIZE] - KillNPC with style, kills the NPC you are pointing at
extinguish|ext [all] - Puts out all nearby fire (or all fire)
falldamage - Turns fall damage on/off
feed - Adds the specified quantity to your food bar
firedamage - Turns fire damage on/off
flammable [CATCH] [SPREAD] - Sets the specified block at the flammability level
fly [SPEED] - Allows you to turn flying mode on/off, speed specified your flying speed
flymode - Allows you to specify which flying mode to use
fog [tiny|small|normal|far] - Changes the render distance
freecam - Allows you to freecam around the map
freezecam - Freezes the players camera at the current location
freeze - Freezes mobs so that they cannot move or attack you
gamemode - Changes the World game mode to creative or survival
gamemode toggle
goto - Goto a waypoint
grow [all] - Grows all saplings/wheat on the map.
hardcore [enable|disable] - Configures the world to be in hardcore mode or not
hardcore toggle
heal - Heals a player the specified number of points
health - Sets the health of a player to pre-defined figures
help [COMMAND] - Gives general help when COMMAND isn't specified, gives specific help when COMMAND is specified. Same as /h
helmet [ITEM] [QTY] [DAMAGE] - Specifies the helmet the player wears
home – Teleport to spawn point
hunger - Sets your hunger level to predefined figures
infiniteitems - Toggles infinite items on/off
invrotate [line|item] - Rotates your inventory hotbar with the next line. You can rotate just a single item or the whole line
invstore - Loads or saves your current inventory to file
instantkill - Instantly kills any NPC you hit
instantmine - Turns instant mining on/off (Installing Forge disables this function).
instantplant [grow] - Instantly plants saplings into the ground, if grow is specified the tree will when instantly grow
item [QUANTITY] [DAMAGE] – Gives player item, if quantity isn’t specified maximum amount of that item. Same as /give and /i
itemdamage - Turn item damage on/off. This means you will never have to repair an item again
itemname - Use this command to discover the itemname and ID of your currently selected item.
itemstack [QUANTITY] - Gives the player the specified quantity of maximum item stacks of the item.
jump - Moves you from where you are to where your mouse is pointing. Note: This command is buggy and may put you in the block you move to.
keepitems - Turn this on and you will keep your items when you die.
kill – Kills the current player
killall - Kills all of the specified entity type, this will destroy ALL entities (paintings, minecarts, etc) unless specified otherwise.
killnpc [all|monster|animal] - Kills all living creatures nearby.
light - Turns permanent lighting on and off
listwaypoints - Lists all waypoints. Same as /l
longerlegs - Makes your legs longer so you can walk up 1 block high
macro - Runs a macro
maxstack [ITEMID|ITEMNAME|all] [STACKSIZE] - Configures the maximum stack size of that item between 1 and 64.
mobdamage - Mobs cannot give you damage
moveplayer - Moves the player the specified distance (in blocks) in the specified direction, (neswup)
msg - This commands adds a message to the console.
music [play|pause|skip|stop|VOLUME] - Requests a music track to be played, there is a limitation of at MAX 2 tracks per day. Set the volume by specifying VOLUME.
noclip - Turns no clip on/off.
output - This just toggles SPC messages on/off, useful for macros/scripts.
path [size]
phelp [COMMAND] - Provides help for plugins
pick [QUANTITY] - Command which gives you the blocks you point at
platform - Puts a glass square under your feet
plugin - Lists all loaded plugins and also allows you to enable/disable plugins
pos – Gives current player position. Same as /p
ralias - Removes the specified alias
reach - Sets the player reach distance.
refill [all] - Re-stocks your items in your inventory to the maximum ammount
rem - Removes the specified waypoint
removedrops [all] - This command removes item drops from the world.
rename - Allows you rename a command to a new name
repair [all] - Repairs the currently selected item to full health
repeat - Repeats the last used command (useful command to bind)
reset - Resets the player settings
resize [1080p|720p|480p|setdefault [WIDTH]|] - Resizes the Minecraft window, no arguments sets it to default
reskin - Reskins the NPC which you are pointing at to the specified skin
return - Moves the player to the last position before teleport
ride - Allows you to ride any NPC which you point at
sc - Added scripting support (more information coming soon)
search - Allows you to search for items using a name
set - Mark a waypoint on the world
setjump [JUMP|reset] - Sets the height that you jump. Note: Turns fall damage off if the jump is configured to move than 1.
setspawn [ ] – Set the current position as the spawn point, if X Y Z are specified sets that position as spawn point
setspeed [SPEED|reset] - Sets the speed that the player moves
sign ["LINE1"] ["LINE2"] ["LINE3"] ["LINE4"] - Allows placing and editing of signs without a GUI
skin - Change your players skin to ANY minecraft player
slippery [SLIPPERYNESS] - Makes the specified block slippery, default is 0.6
spawn [QTY] - Allows you to spawn an individual creature where you are looking.
spawner - Changes the mob spawner the player is pointing at
spawnportal - Spawns a portal nearby the player
spawnstack - Spawns the specified creature where you are looking (use "/spawn list" to get a list of creature names and codes).
sprinting [enable|disable] - Turns sprinting always on
stackcombine - When run combines all of the same stack types into the same stack
stacklimit - Turns stack limiting on/off
startup {ARGS} - Specifies a command to run on startup
superheat [all] - Turns items which are furnace-able into their furnaced form
superpunch [DISTANCE|reset] - Hit that NPC with a punch like no other
tele - Teleport to X Y Z coordinates. Same as /t
textcolor <<normal|error> <0-f|random>>| - Allows you to configure output text colors
time [set|get|day|night [minute|hour|day [TIME]]|speed SPEED] - Set and get the time within minecraft.
timeschedule unbind - Unbinds the specified key from a command.
unbindid - Unbinds a command from a keyboard key using the key id
unbinditem [all] - Unbinds the currently selected items bindings, or all bindings
update - Turns update checking on/off
useportal - Instantly transfers you to the nether, use it again to go back.
waterdamage - Turns water damage on/off
weather - Toggles weather on/off
world - Allows you to explicitly, have control over your world.
world load - Loads the specified FILE, this allows you to play ANY save on your computer, not just World1-5, and can have any name
world save - Explicitly saves your game then returns to it
world seed [SEED] - Allows you to see and change the seed of the map, so it will generate custom terrain
world new [FILENAME] [SEED] - Creates a new map at the specified location
world exit - Lets you exit a game without saving (perfect from when a creeper blows something up)
world list - Lists all the saves which you can load from ".minecraft/saves"
world backup - Allows you to backup your current world into .minecraft/backup
xp - XP (player experience) related commands

//limit - максимальное количество блоков используемое при командах. Используется для предотвращения катастрофических инцидентов.
Действия с историей
//undo [num-steps] - отменяет последнюю вашу команду. [num-steps] - число отмены последних команд.
//redo [num-steps] - возвращает отмененные вами команды. [num-steps] - число возвращения команд отмененных вами.
/clearhistory - отчищает историю.
Выделение
//wand - дает вам деревянный топор (топор редактирования). ЛКМ по блоку деревянным топором назначает первую позицию, ПКМ по блоку назначает вторую позицию.
/toggleeditwand - отключает деревянный топор. Теперь им можно пользоваться по прямому назначению.
//sel - выбор формы выделяемого региона. cuboid - выделяет куб. poly - выделяет только в плоскости.
//pos1 - назначает первой позицией для выделения блок на котором вы стоите.
//pos2 - назначает второй позицией для выделения блок на котором вы стоите.
//hpos1 - назначает первой позицией для выделения блок на который вы смотрите.
//hpos2 - назначает второй позицией для выделения блок на который вы смотрите.
//chunk - выделяет весь чанк на котором вы находитесь.
//expand - расширяет выбранный вами регион на amount блоков в направлении, в которое вы смотрите.
//expand - расширяет выбранный вами регион на amount блоков в направлении direction (north, east, south, west, up, down)
//expand [direction] - расширяет выбранный вами регион в двух направлениях. amount количество блоков расширения в первом направлении, reverse-amount - количество блоков расширения во втором направлении направлении, direction (north, east, south, west, up, down). Например: //expand 10 7 south - расширит выбранный регион на 10 блоков к югу (south) и на 7 блоков к северу (north).
//expand vert - максимально расширит выбранный вами регион вверх и вниз.
//contract - уменьшает выбранный вами регион на amount блоков в направлении, в которое вы смотрите.
//contract - уменьшает выбранный вами регион на amount блоков в направлении direction (north, east, south, west, up, down)
//contract [direction] - уменьшает выбранный вами регион в двух направлениях. amount количество блоков уменьшения в первом направлении, reverse-amount - количество блоков уменьшения во втором направлении направлении, direction (north, east, south, west, up, down). Например: //contract 10 7 south - уменьшит выбранный регион на 10 блоков к югу (south) и на 7 блоков к северу (north).
//outset [-hv] - Outset the selection in every direction.
//inset [-hv] - Inset the selection in every direction.
//shift [direction] - перемещает регион выбора. Не перемещает содержимое региона. amount - расстояние, direction (north, east, south, west, up, down).
//size - введите что-бы узнать размер выбранного региона.
//distr - введите для получения списка блоков находящихся в выбранном регионе.

Для получения предмета вводим /give player и ID предмета в окне чата.
Советую использовать TMI:)