Document management solutions

[Vikram C.]

Do any of you have a recommendation for a good document management solution for my real estate invoices, insurance policies and other documents? I want to be able to scan every single document and store it in an electronic format so that it can be retrieved from anywhere. The solution will also need some method of categorizing the documents (by city and property, for example). Being able to search, as in gmail, would be great but is not a deal-breaker.

I have heard that Docusoft is good but it seems like something designed for large companies and I am looking for something simpler but equally effective.