Aqaurius Soft PC Unit Converter
Aquarius Soft PC Unit Converter lets you quickly convert between 2 units, like converting between square meter and square foot etc. One of the main features of this unit converter is the ability to let you add your own custom units for conversion... which means you need not wait for the software...
http://www.aquariussoft.com/downloads/asuc1_00.exe - 860Kb - Download - Screenshot

Unit Conversions 2000
Unit Conversions 2000 is a small utility that will allow you to quickly convert units of measure from one system to another. Facilities are included to convert various Lengths, Weights, Volumes, Areas, Density, Power and Scale measurements.
http://www.gregorybraun.com/UCONVERT.ZIP - 170Kb - Download - Screenshot

Unit Converter for Excel
Unit Converter for Excel is an addin for the Microsoft Excel to perform various conversions between many types of measurement units. The units are grouped in the following categories: Dimensions and capacity, Energy and power, Mechanics, Hydraulics, Heat, Electricity, Magnetism, Light and... Unit Converter for Excel works under Windows 95, Windows 98, WinMe, Windows NT 4. ... 0, Windows 2000 and Windows XP with Microsoft Excel 2000,XP or 2003 installed. ... You can also use UNITCONV formula to perform conversions.
http://www.urvas.com/unitconv/unit_converter_for_excel.zip - 1Mb - Download - Screenshot

Unit Conversion Tool
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. Unit conversion tool is scientific software and developed for fast and easy unit conversion. ... Survey), Fingerbreadths (Biblical), Furlongs, Hands, Hectometers, Inches, Kilometers, Leagues (British), Leagues (International), Leagues (Statute), Meters, Micrometers, Microns, Miles, Miles (Imperial), Miles (Nautical), Millimeters, Mils, Paces, Perces, Picas, Points, Poles, Reeds (Long...
http://www.unitconversiontools.com/UCToolSetup.exe - 919Kb - Download - Screenshot

AccelWare Unit Conversion Tool
AccelWare Unit Conversion Tool is a powerful, intuitive and easy-to-use utility for quick and accurate conversion between almost every possible units of measure, from one system to another. The latest version includes more than 2200 units in 78 conversion tables. ... The categories include: length, weight, speed, mass, numbers, volume, dry volume, time, density, force, pressure, energy, power, flow, temperature, angle, light, fractions, data transfer, data storage, and more! ... Features include: high accuracy with support of the number of decimal places to display, ability to save results...
http://www.accelware.com/Unit_Conversion_Tool/uctsetup.exe - 944Kb - Download - Screenshot

FNA
FNA FNA is a multi-function scientific calculator and unit conversion utility. Four modes of operation (statistics, trigonometry, base-n, and unit conversion). Convert units of Acceleration, Angle, Area, Density, Energy, Force, Fuel Efficiency, Length, Mass/Weight, Power, Pressure, Speed,... Version 1. ... Built-in references now include Periodic Table of Elements with extensive chemical data, drop-down conversions for metric prefixes, counting units and atomic weights. ... 31a now has support for German, Dutch, Swedish, Italian and Portuguese keyboards.
http://www.rjsoftware.com/files/FNA_131.zip - 319Kb - Download - Screenshot

Convert It
Convert it is a program converting various types of measurement units(supports more than 200 unit types). The program has seven main categories of units each containing lots of unit types in them. These categories are as follows; Length Weight Volume Area Density Power and Count it also has a... It can also learn new units and make conversions between the integrated units in the program and the units that have been taught. ... The program is fully customizable by default it supports English Turkish and German if needed other languages can be adapted easily.
ftp://ftp.skali.com/pub/download/C/conver10.exe - 1Mb - Download - Screenshot

ESBUnitConv Pro - Unit Conversion
ESBUnitConv Pro is Unit Conversion Software for Windows to easily convert between 610 units in 27 different measurement categories. Includes Units for Temperature, Distance, Mass, Area, Volume, Pressure, Velocity, Acceleration, Force, Energy, Power, Fuel Consumption, Flow, Torque, Angles, Time,... The Primary SI Unit in each measurement category is displayed bold, and buttons are supplied to quickly select it. ... Register only once for the life of the product. ... Registered version also includes Electronic Documentation and PDF designed to produce Printed Documentation.
http://www.esbconsult.com/esbunitconvpro.zip - 1Mb - Download - Screenshot

APSW Instant Converter
If you've ever had trouble converting units, or don't know how to turn on a calculator, this is an invaluable tool. A universal conversion program that provides conversion for heat, length, area, weight, volume, time, angular, timezones, power, energy, SI units and Avoirdupois weight and much more. ... This program is a very simple, intuitive, useful and nice unit conversion program. ... APSW Instant Converter offers nearly every kind of conversion imaginable and gives an instant response. ... This is a very useful piece of software for anyone in education, especially mathematicians or...
http://www.allpurposesoftware.com/downloads/instantconverter.exe - 4Mb - Download - Screenshot

ESBUnitConv - Freeware Unit Conversion
User friendly FREE Windows Utility to easily convert between 510 units of measurement in 20 categories. Includes Units for Temperature, Distance, Mass, Area, Volume, Pressure, Velocity, Acceleration, Force, Energy, Power, Fuel Consumption, Flow, Torque, Illumination, Luminous Intensity, Angles,... Users can now choose between English International (Default) and English (US). ... Includes Windows XP Support. ... Looks best in 16-bit or better Colour.
http://www.esbconsult.com/esbunitconv.zip - 814Kb - Download - Screenshot