Programmable graphical scientific calculator
A fast tool to caculatate greenhouse gases in agriculture
An HP RPN calculator with interval output
Electronic paper for computations and graphs
RPNCalc - The command line Reverse Polish Notation (RPN) Calculator
Liothyronine dosage calculator
Simple Java computer algebra calculator
PeCalc is a polyvalent engineering calculator for S&T students
A Gem Stone weight estimator/calculator for mounted gemstones in items
Helps with the Mach3 CNC Threading functionality
Plugins for OpenCPN
Evaluate math expressions from command line or in interactive session.
A simple Clifford algebra calculator
Calculate number of turns needed to produce a coil with given L
My own project
A powerful arbitrary-precision calculator.
NMR Product Operator Calculator
Portable bundle for Windows
A simple molecular weight calculator
a free cross platform checksum utility, supports 58+ hash algorithms