Any resource from where free post processing shader codes can be downloaded from?

I'm trying to find some cool post processing shader codes to try out .. Note that I'm just doing this for educational work so there's no copyright infringement that I would be causing, for those wondering .. I just need to see whats possible with it, and so on ..

So far I've only found this website: http://www.facewound.com/tutorials/shader1/ , but the effects here are relatively '2D' in natur开发者_开发百科e (not strictly speaking here) .. I'm looking for some effects which may be used in a first person view .. Here's what I'm particularly interested in:

1. maybe a circular blur (center portion is fine but the circle around it is not) kind of effect maybe ..
2. Maybe something similar to the 'Cartoon Rendering' effects here: http://www.talula.demon.co.uk/postprocessing/postprocessing.html

This question is too old, but maybe someone want to know... For the Cartoon Rendering' effect i found an example here: -http://xnacommunity.codeplex.com/wikipage?title=ToonShading&referringTitle=Ejemplos It's in XNA 2.0 but can be converter to 4.0

-http://rbwhitaker.wikidot.com/toon-shader