From EngineHub.org Wiki
Note: If you can't copy chests (they get emptied), then your version of WorldEdit is either incomplete (work in progress) or it is the wrong version (if you are using Bukkit).
WorldEdit is for several different platforms:
- For Minecraft Forge, download Forge WorldEdit and put it into your mods/ folder (Need detailed instructions?).
- For Bukkit, download Bukkit WorldEdit and put it into your plugins/ folder (Need detailed instructions?).
There are some unofficial versions:
- Unofficial version for LiteLoader: See WorldEditWrapper
- Unofficial version for Canary: See WorldEdit for Canary
WorldEdit is also for schools and classrooms! A version comes with MinecraftEdu.