ScratchWorlds is a CraftBukkit plugin for Minecraft 1.6+ to allow players to create "scratch" worlds, or temporary areas that are regenerated regularly.
In order to build ScratchWorlds, you will need Ant 1.6 or newer, as well as a compatible JDK on your system (Sun JDK 1.5 or newer is preferred). Simply run ant jar and watch as ScratchWorlds builds itself. (The latest CraftBukkit and Permissions 3.1.5b will fetch themselves.)