1. Zillow
2. Realtor.com
3. Redfin
4. Trulia
5. LoopNet
6. StreetEasy
7. Homes.com
8. Movoto
9. RealtyTrac
10. Auction.com

1. Zillow
2. Realtor.com
3. Redfin
4. Trulia
5. LoopNet
6. StreetEasy
7. Homes.com
8. Movoto
9. RealtyTrac
10. Auction.com