Experian Hitwise ranked real estate sites according to visis for the week ending Feb. 27, 2010. Here are the top twenty:

1. Realtor.com
2. Zillow      
3. Yahoo! Real Estate    
4. Rent.com     
5. ZipRealty      
6. Trulia.com       
7. Homes.com    

8. ServiceMagic 

9. MSN Real Estate

10. MyNewPlace
11. RE/MAX Real Estate       
12. Apartment Guide    
13. Apartments.com    
14. Rentals.com     
15. Listingbook Services       
16. Century 21 Real Estate   
17. US Department of Housing and Urban Development     
18. ForRent.com      
19. HomeAway       
20. ApartmentFinder.com