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.
Sage
Open Source
Sage offers business management, bookkeeping & accounting software to meet any business need, from small to midsized businesses.
Swift Calcs
Free
Swift Calcs enables users to effortlessly create and collaborate on interactive computational documents, from any device.
