Soulver

Soulver helps you do quick calculations and work things out. Use Soulver to play around with numbers, do "back of the envelope" calculations, and solve day-to-day problems.

Commercial Mac OS X

OpalCalc

OpalCalc is a brand new type of calculator for the PC. As easy to use as Notepad or a word processor, OpalCalc allows natural language in the sum and multi-line support so you can go back and adjust your previous calculations on the fly.

Freemium Windows

CCCalc

CCCalc is a calculator with tape, you can correct any printed character with, and the tape recalculates everything itself. Unlimited precision, visible and even...

Free Windows

Notepad Calculator

For jotting down quick calculations. Mix free form text with calculations and see the results appear in the right hand margin as you type.

Free Open Source Web

CalculatePlus

CalculatePlus is the new way of performing your daily basic calculations, such as basic +/- or percentage calculations on the Web.

Free Android iPhone Web Windows Phone