My asset repo for s&box, Open source for anyone to use. This also has some ported assets from various games (primarily valve titles.) Those will be listed in their own seperate folder labeling what game they're from so there is no confusion. You may see other people helping out on this from time to time. Make sure to check them out they're cool. :)
Here is a quick rundown of how all of my folders are used.
Models - This includes every model in the repo.
Materials - These are Materials for pretty much anything.
Sounds - Sounds like Music, ambient noises, other things like that.
Clothing - Clothing for the citizen (NOTE: Must be moved into the base s&box folder for them to appear in the menu!)
Shaders - Shaders for the game and stuff