MacZ Software has rolled out version 3.4 of itis shareware calculator application, BetterCalc. The new version improves overall compliance with Mac OS X look and feel, by adding the ability to minimize a window from the keyboard, and support for Window menu, GoreGraphics antialiasing (in text fields and elsewhere), and Mac OS X "unsaved bullet". Also the font sizes in advanced calculator mode are more adjustable, and the support for sheets (document-modal dialog boxes) has been implemented.
BetterCalc is a calculator that can display everything you type as you type it, while constantly auto-updating the total. BetterCalc also supports the true mathematical order of operation, as well as exponents and brackets.
BetterCalc is available for US$8. You can find more information at the MacZ Software Web site.