Calculates income tax form entries, helps do your taxes.
Calc: arbitrary precision C-like arithmetic & calculator
Simple Java computer algebra calculator
Open source program computing and notifying for Muslim prayer time.
A powerful arbitrary-precision calculator.
Financial Calculator
jRCaLc is a program designed to aid you in working with resistors.
Smith Chart Calculator JAVA
TI graphing calculators <-> computer communication software
DIY fertilizers calculator for planted acquariums
Command-line calculator of basic statistics.
Fast and simple calculator.
Simple Parsing Calculator