fxSolver
WolframAlpha
SpeedCrunch
Qalculate!
Numi App
Soulver
Wolfram Mathematica
MATLAB
Giac/Xcas
GnuPlot
GeoGebra CAS Calculator
Geometry Pad
GeoGebra
Dr. Geo
Lybniz
Cabri
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.
fxSolverWolframAlpha - WolframAlpha brings expert-level knowledge and capabilities to the broadest possible range of people—spanning all professions and education levels.
GnuPlot - Gnuplot is a portable command-line driven interactive data and function plotting utility.
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 .
GeoGebra CAS Calculator - Free online algebra calculator from GeoGebra: solve equations, expand and factor expressions, find derivatives and integrals
Qalculate! - Qalculate! is a multiplatform multi-purpose desktop calculator.
Geometry Pad - Geometry Pad is a dynamic geometry application for iPad and Android tablets.