1)   Uconeer 2.4
Freeware. 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.

 2)   Unit Conversion Tool 5.0
Unit conversion tool can convert about 250 various types of measurement units from one system of measure to another. It can convert Length, Weight, Volume, Area, Density, Power, Time, Count and other units.

 3)   Aqaurius Soft PC Unit Converter 1,0,0,4
Aquarius Soft PC Unit Converter is a simple and fast unit conversion software for the Microsoft Windows platforms. One of the main features of this unit converter is the ability to let you add your own custom units for conversion.

 4)   Weights And Measures Plus 3.1
WAM+ is a unique Unit Converter that will input and output either Decimals or Fractions. It also does Trigonometry, Temperature, Roman Numerals, Number Systems, and now World Currency. Definitions and Reference Tables are included. Educational.

 5)   ESBUnitConv Pro - Unit Conversion 5.2
Unit Conversion Software for Windows to easily convert between 560 units of measurement. Includes Units for Temperature, Distance, Mass, Area, Volume, Pressure, Velocity, Acceleration, Force, Energy, Power, Fuel Consumption, Flow and more.

 6)   Converter Pro 3.22
Converter Pro comes with a database that contains the most important conversion factors to convert length, area, volume, mass, force, pressure, density, energy, power, temperature, dynamic viscosity, kinematic viscosity and time units.

 7)   TechSheet 2.0
TechSheet a technical spreadsheet that allows for calculations that incorporate units of measure with associated values in each cell. Numerical manipulations result in consistent units of measure and automated unit conversions.

 8)   SAM 1.52
SAM is a collection of useful utilities that can help you in day to day life. SAM is easily accesibly via the system tray or using keyboard shortcuts. The modules include a Reminders manager, Notes, Tasks, Unit conversion, World time clocks and more.