Calculator.org
Science, Math, Software, Calculators - Calculator.org. Calculator resources including free download of scientific engineering, statistical, and financial calculators.
https://www.calculator.org/
Wahoo Software
Science, Math, Software, Calculators - Wahoo Software. Financial desktop calculator.
http://www.xmlcreate.com/
sCal-ver.0.9 Web
Science, Math, Software, Calculators - sCal and sCal2. Small, open source (free), scientific and engineering, JavaScript-programmable calculators.
https://scal-2.sourceforge.net/
X-Bc - a GUI to bc, a scientific calculator
X-Bc is a graphical user interface to the arbitrary precision calculator bc. It is written for Linux (Unix). It provides lots of funcionality, such as trogonometry, number theory and the usual calculator functions, but is held simple and not disturbing.
https://x-bc.sourceforge.net/
Big Integer Numbers Calculator
Science, Math, Software, Calculators - Big Integer Numbers Calculator. Free download big integer numbers calculator.
http://www.bigcalc.scriptmania.com/
16 function webpage calculator
Science, Math, Software, Calculators - 16 function webpage calculator. Scientific web page calculator, written in JavaScript.
https://www.onlinecalculator.info/
Online Calculators
Science, Math, Software, Calculators - Online Calculators. A collection of everyday use calculators and converters written in Javascript and PHP, available to use and download.
https://www.online-calculators.co.uk/