User blog comment:ZoshiX/Project FBCraft/@comment-3126873-20140619223553/@comment-1917722-20140621105936

For terrain-editing software I'd say MCEdit for things you want to do outside the client itself, and WorldEdit for other stuffs. I'm also pretty sure there's more editing software out there, but these are often used. I think especially LDZX and NHC HQ's will be a dillion times easier to build with WorldEdit.