WorldEdit

WorldEdit is a SMP Bukkit Plugin that can remove or add blocks in a straight line or box. Basic commands are //hsphere, //hcyl, //fill, //set, //undo, //setpos1, //setpos2, //copy, //paste, and //redo. To use WorldEdit, you have a Wooden Axe, known as the wand, to edit blocks. You left click to set the first position, and right click to set the second position.