FreeCalc.com has over fifteen engineering design applications developed by Beacon Engineers Inc, which are useful for quick calculations for work or research. The applications can be used freely online; to be able to save your work and get further benefits, a subscription is required. Categories include general engineering, liquid and gas flow, fans and HVAC, pumps, heat transfer, vessels and tanks, and civil and structural engineering. Each application has a very easy-to-use interface, and there are many options from which to choose. Equipment data sheets are also given on the site for quick printing and submittal to suppliers. There are several additional applications under development.