This is the Texmod utility for texture modifications. In case you didn't know, Texmod is a registry cleaner/repair utility for the hardcore "Warcraft gamer" (as well as those who are just not into the game anymore). Many people who play this game have very unorganized computer systems, making errors and deleting files left and right as they go. What I don't recommend doing is messing around with the registry and deleting files you don't need, that's a sure path to an unorganized and unprofessional game. That's where the Texmod utility comes in handy!
When I first heard about this modding tool, I thought it was just another cheat tool. After trying it out myself, I can tell you that is not true! Texmod is a great free video game utility that can repair any modding problems you might have on your game. Not only does it fix your errors, but it also enables you to do other modding tasks such as changing the sky or the ground of the land. If you don't know what these tasks are for, you probably won't even be able to find them in your Texmod utility.
For example, if you want to change the terrain of your map, all you have to do is install mods that enable you to dig anywhere you like, unlike vanilla skid that you have to start from the bottom and move up. It also has tools that allow you to build bridges and other structures. If you are one who doesn't like having to deal with so much modding tools, then I suggest you try this modding tool. If you decide to try it, be careful not to download any viruses onto your computer. I would say the Texmod utility is the best and most popular modding tool for minecraft (although there are plenty more to choose from).