The reason for wanting this, is I would like to test and/or save a Custom map, (server_level.dat), without the need to create a server, or even be online.
Now, the WoM Custom Client works great for online servers, but when you use it offline, it just generates a map, and won't let you save or load any maps in the minecraft folder.
Another reason why I personally would like it, is to be able to test maps on my better computer, which doesn't have internet on it, (Yet). So far, I've been testing all of my maps on a computer with 512MB of RAM, which, as you can assume, isn't very good for even medium sized maps.
I'm not asking for anyone to make this, but it seems like it would be useful, and doesn't seem like it would require much effort. I myself have never looked into coding with Java, so I'm useless at it.
Please login to view downloads!