Creative

Plots and WorldEdit.

More about the mode under Creative. Instead of /plot you can use /p.

Get a plot

/plot auto: get the next free plot
/plot claim: claim the plot you stand on
/plot home: go to your plot

Visit plots

/plot visit <player>: visit a plot
/plot list: list plots
/plot info: plot information
/plot middle: go to the middle
/plot like and /plot dislike: rate

Manage your plot

/plot add <player>: let someone build while you are online
/plot trust <player>: let someone build even while you are offline
/plot remove <player>: take permissions away
/plot deny <player>: ban from your plot
/plot kick <player>: kick off your plot
/plot flag set <flag> <value>: set a flag
/plot flag list: list flags
/plot set floor|wall|border: change the look
/plot clear: reset
/plot delete: give up

WorldEdit

//pos1 and //pos2: set corners
//set, //replace, //walls, //overlay: edit
//copy, //cut, //paste, //rotate, //flip: copy
//stack, //move, //smooth: change
//sphere, //cyl, //pyramid: shapes
//undo and //redo: undo

More under WorldEdit.