The Ordenador, a Texture Optimizer

This tool is on the Nexus. I used it on the Dungeon Seige textures I made and it did an excellent job. It doesn't work for DS RAW files, but it does work for DDS textures. It will automatically resize a large batch of texures, correct some things, and make new mip maps. For example; if you have a file of various sized textures ..... say 1024x1024, 512x512, and you want them all 512x512 or 256x256, you just do the settings and go.

I initially got it for Skyrim and Fallout 4. I run over 200 mods in each of these games, and some of them have 2k and 4k textures, totally unnessesary. Also, some of the Vanilla Textures in these games are huge, and sometimes not the right size.
I set the Ordenador for 1024x1024 textures and everything larger was reduced to this size, the lower sized textures remained the same, but some that had something needing fixing, were fixed. Everthing got new mip maps. Quality remained high, and I shaved over 3gb off the data file size.

You have to go to both these links to get what you need.

http://www.nexusmods.com/skyrim/mods/12801/?
http://www.nexusmods.com/skyrim/mods/71294/?