Great list so far! Keep 'em coming.
Anything I do will be done from "scratch" in so much as anyone writes any code from scratch. So to my knowledge there shouldn't be any copyright or attribution issues. Whatever I am able to produce will be free to use in any manner and I hope others plan to do the same.
On a side note, I nearly fried my graphics card because of a typo causing a non-terminating, nested for-loop. Shader work is dangerous business. :P