Providing online non-downloadable software enabling users to access information in the field of real estate; Providing online non-downloadable software enabling buyers and sellers of real estate, real estate agents and brokers to access real estate related calculators and to access, track and communicate about real estate transaction information and documentation; Providing online non-downloadable software/downloadable mobile application software for use in the field of real estate for managing, monitoring, tracking, locating, collecting, distributing, publishing, and analyzing information about residential real estate property listings, real estate market statistics, individual real estate agents, and current and prospective clients of real estate agents