Calculator with currency-converting capabilities.
Python utility that helps you perform mathematical operations
Do your everyday math the easy way.
Calculon – A nice looking calculator that includes a 2 line display and a choice of 10 different face colors
Calcolatrice – A good demonstaration of a simple program created with Applescript Studio
Stacniac X – RPN calculator without visual buttons: you enter numbers and then type in commands
A stylish and fully featured calculator for Mac OS X
MathTables is a program that helps parents teach their children how to use the four basic math operations.