Minecraft Cartograph is a program which lets you render your entire Minecraft world into an image. I use this when I start a new file because it's very helpful to find a place to start creating a working area. It generates a map of everything rendered in the save point. Some of the generated images:





I prefer the isometric rendering (as seen in the bottom one). I didn't make this program, it was made by Zombuster of the MineCraftForum network.

Original Thread Containing Download Link:
Cartograph - map your Alpha - Minecraft Forums