Investment Instruments Corp., co-founded by Providence resident Owen D. Johnson and based in Newton, Mass., offers its property management tools through iiProperty.com, a Web site that compiles and tracks data used by Realtors, brokers, landlords, homeowners and professional real estate investors...

...The iiProperty dashboard gives customers a comprehensive picture of their property portfolios. Among other features, it enables customers to advertise multiple property sale and rental listings online, set up automatic monthly tenant invoicing, send tenants notices through the mail, run cash flow and tax reports, and track detailed income and expense items...

...Investment Instruments has been aggressively ramping up its iiProperty offering since last October, when the company garnered nationwide media attention with its Rentometer, a free Web service designed to instantly provide the average rent for any size apartment in any real estate market in the country.

Johnson and [Allison M.] Atsiknoudas, who founded the company in March 2006, met and became friends in 1994, when both were studying at the Massachusetts Institute of Technology. Investment Instruments currently has 12 employees who work remotely on both the East and West coasts and a few other locations throughout the country, Atsiknoudas said.