While sites like Zillow, Ziprealty, Trulia and Redfin prioritize their Web sites and offer mobile apps as complementary additions, Smarter Agent is all about the mobile space. Smarter Agent began building real estate tools with mobile GPS technology back in 2000, and its dedication to the technology means that Smarter Agent apps are available for a wide variety of mobile devices, including iPhone, BlackBerry and Google Android [source: Smarter Agent].
Smarter Agent's app is free and covers more than 300 markets nationwide. Additionally, Smarter Agent offers an in-development search engine on its Web page with a dizzying number of customization options. If you only want to find houses with saunas and sunrooms, consider Smarter Agent your search engine.
But finding a house is only half the battle -- even if it's the right size and price, there are other important elements to consider. Parents, especially, want to make sure their new neighborhood is safe, making the next Web site on this list a must visit.