Scribd

It is amazing how web is changing the conventional learning system and how it is fast changing the idea of democracy. Wikipedia started this goldrush where in "We the people" were given the power to write history, the way we see it. Then came lot of websites which further finetuned or tweaked this concept, yahoo! answers, google scholars etc.
And now we have scribd.com. An amazing site with breathtaking documents on anything, absolutely anything, from basic DIY guides to complex scientific research material. You name it they have it. Hats off to the promoters.