fxSolver
SpeedCrunch
WolframAlpha
Qalculate!
Numi App
Soulver
Wolfram Mathematica
MATLAB
On-Screen Keyboard Portable
Free Virtual Keyboard
Onboard on-screen keyboard
Comfort Keys Pro
Florence Virtual Keyboard
Hot Virtual Keyboard
KeyScrambler
Kvkbd
Calculate multiple equations at once, Edit existing formulas and Create new ones, Compute large numbers of values, Plot graphs, Link your results, Solve full problems and Share worksheets with your friends.
fxSolver is a free tool developed by a team of engineers and programmers with the sole intention of providing a unique, useful and free service. The vision of the development team is to allow students, engineers, and hobbyists to come in contact with mathematics and to be able to solve problems without necessarily being familiar with professional math software or programming languages.
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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 .
Free Virtual Keyboard - Free Virtual Keyboard is a free, lightweight, multilingual and finger friendly virtual keyboard.
WolframAlpha - WolframAlpha brings expert-level knowledge and capabilities to the broadest possible range of people—spanning all professions and education levels.
Onboard on-screen keyboard - An onscreen keyboard useful for tablet PC users and for mobility impaired users.
Qalculate! - Qalculate! is a multiplatform multi-purpose desktop calculator.
Comfort Keys Pro - Virtual keyboard, automation, shortcuts, flexibility, advanced clipboard management.