From author's site:

Instant Converter - a universal unit conversion program that converts units from time, length, area, volume, power units, bits, bytes, megabytes, tera, giga, mega, kilo, drams, celsius, farenheit, feet, miles, gallons, litres, seconds, quadrant, nautical miles SI units and Avoirdupois weight, and much more. Even comes with a breeding chart most useful for animal husbandry.

Instant Converter is an easy to use and fast unit conversion software for all Microsoft Windows platforms. Instant Converter' is a very simple, intuitive, useful and nice unit conversion program. Simply type in a value into one of the edit boxes and immediately see the result in the second edit box. Very easy.

This is the XE.com Universal Currency Converter ®, the world's most popular currency tool. You can perform interactive foreign exchange (FX, or forex) rate calculations, using live, up-to-the-minute currency rates.

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.

AllerCalc (formerly known as VersaCalc) is an expression calculator which allows you to directly enter an expression to be evaluated. This versatile calculator features:

-A re-sizable rolling display storing all of your inputs and results.

-More than one hundred functions, including algebraic, transcendental, trigonometric, hyperbolic, engineering, statistical, and financial functions.

-Numerical integration, differentiation, and root-finding.

-Calculations not only in decimal but also in binary, octal, hexadecimal, and other numeric bases.

-A comprehensive unit converter that can convert between virtually any two units in metric, English, and US systems.

-A list of common physical constants found in science and engineering.

Unit conversion program that will convert the most popular units of distance, temperature, volume, time, speed, mass, power, density, pressure, energy and many others, including the ability to create custom conversions!

Convert runs quite well on Linux and UNIX using Wine. If you do this, you will need to change the tab layout to use a single row by going into Options > Preferences > Tabs, and uncheck the Multiple Lines option.

GraphCalc is an all-in-one solution to everything from everyday arithmetic to statistical analysis, from betas to Booleans, from cubes to calculus, from decimals to derivatives and conversions. GraphCalc combines all the features of a professional mathematics package with the simplicity of an easy to learn windows interface. It provides user-friendly help and tutorials to guide you through the easy and fun process of mastering GraphCalc.