Wolfram Alpha
Freemium
Wolfram Alpha is a computational knowledge engine or answer engine developed by Wolfram Research.
Sage
Open Source
Sage offers business management, bookkeeping & accounting software to meet any business need, from small to midsized businesses.
Mathematica
Commercial
Wolfram Mathematica (usually termed Mathematica, Mathematica software suite) is a mathematical symbolic computation program.
fxSolver
Free
fxSolver is a math solver for engineering and scientific equations.
Compare GNU Octave with alternatives
Compare Wolfram Alpha and GNU Octave and decide which is most suitable for you.
Compare Mathematica and GNU Octave and decide which is most suitable for you.
Compare fxSolver and GNU Octave and decide which is most suitable for you.