This script makes it easy to calculate how fast something goes "miles per hour", by allowing you to enter its speed using the more manageable "meters per second."

Scientific calculator with memory, date, time, currency converter, and scientific functions. This version has 50 buttons and three lcd-style displays. The Carpe calculator ZF can be used by just opening a link, as a bookmarklet or it can be customized and implemented in your web site.

Tigra Calculator PRO is flexible cross-browser JavaScript calculator supporting customizable layout, configurative mathematical function set and lots of other valuable features.

Use this practical script to easily convert between the 7 most popular length units- centimeters, meters, kilometers, miles, inches, feet and yards. Simply enter a number, and let the script display the desired equivalents.

A nice utility for genealogy sites to offer to their visitors who do census record searches. This Convenient SoundEx generator form may be displayed inline with your page content or you may provide a link to let your visitors pop it up into a small window. The form displays both the normal census codes as well as special census codes (produced in some censuses prior to 1920) simultaneously as the user types the word. A great (and free) little widget to offer to your genealogy site visitors.

Very usefull control for currency input with PopUp calculator. This control is based on JavaScript code and was tested on Netscape and IE platforms. It is fully customized through CSS file.

An interesting script for converting between integers and Roman Numerals, as well as checking the validity of Roman Numerals for common mistakes.

JavaScript can help you find acceleration equivalents.