
The Programmer's Calculator.
Key Features:
Supports a rich expression format, which is in most cases identical to what you would type in your programming language.
Support for adding unlimited numbers of variables.
Built-in debugger that lets you see the expression simplified step by step.
Debugger Back-step lets you backup as many steps as you like so that you can replay critical operations.
C/C operator precedence
Mouse optional, all calculator commands and functions can be done using the keyboard alone.
Mini-Calc Mode lets your calculator take up very little screen real estate, and yet remain entirely usable.
Numerous built-in unit conversions (memory sizes, lengths, areas, volumes, temperatures etc.)
Built-in great circle route and straight line distance calculators.
Enables you to read "winmail.dat" attachment files.
Utility integrated with Apple's Mail application and SpamCop.net.
Use an unofficial Inbox by Gmail client for desktop platforms.
Alternative solution to manual encryption or PSE keys.
A complete replacement for Microsoft Outlook that makes you a better manager.
Advanced bayesian spam filter with a simple, easy to understand interface.
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