A scientific calculator that does standard arithmetic, probability, and trigonometric functions.

A spreadsheet that specializes in crunching numbers. There are plenty of functions, similar to the ones in Excel, but not nearly as many. Supports DIF, CSV and RTF.

Calculator with easy-to-see numbers fades from view when not in use. You can input complete formulas, including parentheses, before hitting the equal sign. Handles copy and paste.

Use every-day text for your calculations. Supports variables and blocks of multiple variables. Can get a total or an average.

A minimalist calculator for your menu bar that features history, percentages (such as sales tax), customization and the option of multiple calculators.

A calculator that uses a combination of numbers and text. Features include variables and up-to-date exchange rates.