Terrafirma is mapping tool for Terraria. It gives block information in the statusbar as you hover, lets you zoom and pan around your map, and can save your map out as a png. New features include textures and lighting.
Valve Hammer Editor is tool that you can create your own maps with. You may have to download some models so you have that done. Or if you already have some models you can take them to. You have to have other things to like wads etc etc to it so it wi
VTFEdit is developed by Nem. Visit his website for more details. http://nemesis.thewavelength.net/index.php?p=41
Note that VTFEdit requires the .NET Framework 2.0 to run. Download it from Microsoft here (64-bit).
* Convert .bmp, .dds,