Freeware: Torque

Uconeer 2.4Freeware. 397 units in 46 categories. Includes engineering specific categories like enthalpy, heat capacity, heat transfer coefficient, torque and viscosity. Work with feet and inches. Formatting and clipboard features. Excludes archaic units.

ESBUnitConv - Freeware Unit Conversion 7.3User friendly free Windows Utility to easily convert between 595 units of measurement. Includes Units for Temperature, Distance, Mass, Area, Volume, Pressure, Velocity, Acceleration, Force, Energy, Power, Fuel Consumption, Quantities and more.

Win Convert v5.26is a metric/standard conversion utility. It includes nearly 900 conversion types organized into categories which include: acceleration, area, length, volume, weight, power, speed, temperature, time, torque , and miscellaneous.

Convert (by Josh Madison) v4.10is an easy-to-use unit conversion program.