Finding property data.

[Terry Peters]

Where are the best public places (websites) to find information such as :
- Names and Phone Numbers of property owners - Amount of Equity in their residential property - Purchase history

- Liens - Taxes, etc.  

I know there's a lot a data mining software out there for a price.  I imagine most of these get their information from various public records.  What .gov and .org, etc. sites do Real Estate Investors use?  THANKS!!