Insect - High precision scientific calculator with full support for physical units.

NumWorks - The graphing calculator that makes learning math easier.

WolframAlpha - WolframAlpha brings expert-level knowledge and capabilities to the broadest possible range of people—spanning all professions and education levels.

Random Number Generator - Randomly generate integers or floating point numbers within a given range and specified discrete or continuous statistical probability distribution.

SpeedCrunch - SpeedCrunch. SpeedCrunch is a high-precision scientific calculator featuring a fast, keyboard-driven user interface. It is free and open-source software, licensed under the GPL. Download Documentation Donate .

PCalc - PCalc is the powerful choice for scientists, engineers, students, programmers, or indeed anybody...