Does there exist any non-commercial search engine? When I say "non-commercial", I don't just mean a search engine that doesn't make money, I mean a search engin

Does there exist any non-commercial search engine? When I say "non-commercial", I don't just mean a search engine that doesn't make money, I mean a search engine that excludes all commercial websites. You accept credit cards? Sorry, you're out. You have an ad on your page? Out. Simple as that. I suspect this view of the web could bring back some of the old magic feeling. It would include Terry Tao's blog, and all of Wikipedia, but exclude the SEO'd crap that Google has incentivized.