Mathematica
Commercial
Wolfram Mathematica (usually termed Mathematica, Mathematica software suite) is a mathematical symbolic computation program.
Swift Calcs
Free
Swift Calcs enables users to effortlessly create and collaborate on interactive computational documents, from any device.
fxSolver
Free
fxSolver is a math solver for engineering and scientific equations.
SMath Studio
Free
SMath Studio is a freeware, closed source, mathematical notebook program similar to Mathcad.
Compare Mathcad with alternatives
Compare Mathematica and Mathcad and decide which is most suitable for you.
Compare Swift Calcs and Mathcad and decide which is most suitable for you.
Compare SMath Studio and Mathcad and decide which is most suitable for you.