Document management software

I am in the search for a tool that will help me convert paper documents into a digital library whereby I can easily do categorizing, do searches and so on.

Few things that I want to store:

  • Bills
  • Magazines articles
  • Church sermons, house parties, conferences etc2
  • Quotes from books?

The amount of papers I accumulated is freaking me out, I really want to throw them out, but "what if" I need to refer to them in the future.. argh!.

Know anything like that?