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Transparent desktop calculator with conversions, fractions, calendar, and sales tax.

Calculator with scrolling tape display.

Online graphing calculator.

A user-oriented software package that allows non-programmers the opportunity to explore the computational power of their computer. Free trial download.

A flexible calculator of math functions based on syntax analysis with living graph. Free download.

Simplifies calculations involving numbers, units, and precision.

Financial desktop calculator.

Collection of free web based calculators for many subject areas.

JAVA applet that allows mathematical online calculations.

X-Bc is desktop calculator that provides lots of functionality for scientific working. Input and output stay visble at all time for correction and comparation. It's a frontend to bc.