Freeware. 390 units in 46 categories. Has all basic categories and engineering specific categories like enthalpy, heat capacity, heat transfer coefficient, moment of inertia, surface tension, torque and viscosity. Converts feet and inches to and from decimal lengths. Converts between dynamic and kinematic viscosity. Steel hardness equivalents. Gas Constant in 900 sets of units. Excludes archaic units. Powerful formatting and clipboard features.

Data Master 2003
Free software for automation of professional test and measurement systems, data acquisition, processing and analysis. Especially suitable for scientists who would like to make high-performance, precise measurements in the experimental physics.

Exfilt
Quickly and easily design or analyze stormwater detention ponds and below grade systems for exfiltration/infiltration. Design stormwater systems to meet exfiltration volume drawdown time criteria.

Orifice
Orifice calculates size, flowrate or pressure drops for gas and liquid orifice meters based on ANSI/API-2530-1991, Part 3 (AGA-3) or the International Standard ISO-5167-1:1991. Customary or SI units.

DataFit
DataFit is a tool for performing curve fitting, statistical analysis & data plotting. Fit equations with up to 100 parameters to data with up to 20 independent variables. Define your own equations or choose from over 600 pre-defined equations.

Astra R-Nesting
Astra R-Nesting system provides entry and storage of information about orders and materials, automatic and interactive nesting, utilization of rests, printing nesting plans and specifications, estimation of cost of works carried out.