THGABS: Programmer Art Fix
Mojang: Programmer Art Textures
Nazaru: CWSM's Textures
nonamecrackers2: Cracker's Wither Storm Mod
VillagerN4: Sickened Reuben/Pig Texture (1.3+) And Fresh Wither Storm
FreshLX: Fresh Animations
Tainted: Totally Accurate Wither Storm Plus Extras

you can use these textures as long as credit is given