Some Cool Web 2.0 Apps

Whilts browsing the internets, i have stumbled across a lot of cool web 2.o apps which are really cool and amazing. So today i will share with you two of my favorite,

Scribd is an online book self, with millions of user uploaded books how tos and tutorials that you can view right in a flash window. Aside from viewing there docs you can also download them as a .pdf file if you want it on your comp. Scribd- http://scribd.com

My next app is called wikia and it agregates searches from google, ask, windows live and many other sources, you can even add custom searchs so it adds results from say urbandictionary.com . wikia is like wikipedia + google and i strongly suggest you check it out.
Wikia- http://re.search.wikia.com/index.html