JConvert is a free unit conversion program that has a friendly user interface and can also be used with external applications. Conversions can be modified and/or added easily. Supports multiple languages. Downloads and runs in seconds! Try it now.
Example of 33 1/2 years to score using fractions (ver 1.0.8)
Example of Russian multilingual support (ver 1.0.4)
Example of converting 454 cubic inches to liters (ver 1.0.4)
Example of converting three days into minutes (beta ver).
Example of rendering on a Mac (ver 1.0.4)