wtf custom tilsets?

So, I've been looking around on the forum, and I've found a few scattered threads with custom tilests in them, but is there any sort of library or list where I can find all of them?
Seems like it would be a good idea at least.

this topic moved to a place where you should find all the "scattered" threads in a fairly unscattery way now.
there have been multiple attempts at having a list of all the custom stuff, and also discussions again and again to restart such initiatives, but they usually prove to be too much of a hassle to maintain. I think you can find more about this topic with a litte [search]ing.