Keller Williams Realty is a large real estate company with locations throughout the country. Keller's agents deal with individual homebuyers and sellers and will offer advice and guidance through the entire process. Agents have experience with a wide range of different properties like luxury homes, short sales and foreclosures. Listings can be sorted and viewed on the Web site, and there are other helpful online tools like mortgage calculators. Clients can also peruse potential agents. Call ahead to make an appointment or to speak with an agent.