SpeedCrunch is a fast, high precision and powerful desktop calculator. Available for Linux, Microsoft Windows, and Apple Mac OS X.
Overview
» history and results on a scrollable display
» up to 50 decimal precisions
» unlimited variable storage
» intelligent automatic completion
» fully usable from the keyboard
» more than 50 built-in math functions
» optional virtual keypad to be used with a mouse
» on-the-fly and selection calculation
» customizable appearance
» syntax highlighting and parentheses matching
Reference: http://speedcrunch.org/en_US/index.html
