TEdit 3 Beta for Terraria 1.1.1 is available. If you would like to see it, check out github!
What is Terraria Map Editor a.k.a. TEdit? TEdit is a stand alone, open source map editor for Terraria. It lets you edit maps just like (almost) paint!
Downloads - There will usually be a few versions, as well as the schematics.http://binaryconstruct.com/games/tedit
Issues (posting bugs, crashes, feature requests) - check here if you have an issue, chances are it is already there and you can post a comment on the issue or attach a loghttp://github.com/BinaryConstruct/Terraria-Map-Editor/issues
Wiki - If you can't figure out how to use a tool or feature, please read!http://github.com/BinaryConstruct/Terraria-Map-Editor/wiki/Getting-Started
MAKE A BACKUP OF YOUR WORLD BEFORE USING THIS!!! It will make one for you (wld.Tedit), but you should anyway.