The NumericalChameleon is a free platform independent 100% Pure-Java-Application.

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Developer: Johann Loefflmann
License: Freeware
Operating System: Linux, Unix, Windows

Temperature Converter is a script that instantly coverts between the major temperature units Fahrenheit, Celsius, and Kelvin.

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Developer: javascriptkit.com
License: Freeware
Operating System: All

This script allows you to convert temperatures from Fahrenheit to Centigrade and vise-versa.

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Developer: javascriptsource.com
License: Freeware
Operating System: All

Active Calendar is a PHP class that generates calendars (month or year view) as HTML tables (XHTML-Valid).

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Developer: giorgos
License: GNU Lesser General Public License (LGPL)
Operating System: All

Platform for PHP which has gambArt GUI framework for standalone desktop application development, Semok web application framework, and classes collection (distributed computing, networking, compression, byte compiler, SMS, XML, and database abstraction).

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Developer: Reza Iqbal
License: Common Public License
Operating System: Linux, Windows

An open source library for processing templates.

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Developer: Viktor Kruglikov
License: GNU General Public License (GPL)
Operating System: All

This class (once instantiated), displays a calendar on a webpage, its highly customizable via CSS, can be used as a control on a form, or simply as part of a navigation system.

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Developer: Christoff
License: Freeware
Operating System: Linux, Windows

This code presents the iterative methods of finding the roots of a function.

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Developer: planet-source-code.com
License: Freeware
Operating System: All

This is a little script that uses Python to generate the cellular automata that Wolfram discusses in his book "A New Kind of Scilfram disquot;.

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Developer: code.activestate.com
License: Freeware
Operating System: All