Mathematica, Maple, Soulver, Symbolab Math Solver, OneSecondSolver, Mathway, Microsoft Math Solver, Grapher, NoteCalc, PCalc, Microsoft Calculator Plus, Precise Calculator, Mirai Math, GraphCalc, galculator, Gauthmath, Derivative Calculator, fxSolver, Cymath, AltaVista, Graph.tk, Integral Calculator, Graphmatica, NumWorks Graphing Calculator, Numbat, blekko, kandi, WebMath, GeoGebra Scientific Calculator, MathStudio, PhotoStudy, Omni Calculator, Alternate Math Solver, Math42, GeoGebra Classic, Mathmatiz, SymPy Gamma, Median Calculator, Multi Share Calculator, MetaNumbers, Ruvenss Calculator, Algebra Calculator, Physics-AST, Mean Calculator, Physics Formulas Calculator, Yacas, MathJournal, Blippex, Converters360, Kosmix, Real Time Calculator, JustBrowsing Calculator, Calistry.org, Sellertour PayPal fee Calculator, ThinkCalculator, Getcalc, MochiMicho Calculator, Rule of 3 Calculator, errProof are some alternatives to Wolfram Alpha.