Windows Calculator, Google Calculator, Soulver, SpeedCrunch, RealCalc Scientific Calculator, Numi, Microsoft Mathematics, NoteCalc, PCalc, Microsoft Calculator Plus, Precise Calculator, handyCalc, Caligator, Calculator N+, GraphCalc, galculator, KAlgebra, Calcbot, fxSolver, SpeQ Mathematics, Engineering Calculator, Integral Calculator, NumWorks Graphing Calculator, Moffsoft FreeCalc, Microsoft PowerToy Calc, OpalCalc, Omni Calculator, Giac/Xcas, Frink, Math42, Qaltex, RTRO-CLC2, Abacus, Calculator by Xlythe, Ruvenss Calculator, Standard Deviation Calculator, Algebra Calculator, Online Terminal Calculator, Limit Calculator, GNOME Calculator, VAT Calculators, makina, Calculate, HEXelon MAX, Calcuverter, ECW Expression Calculator, CalcBuddy Calculator, kanakku, Real Time Calculator, JustBrowsing Calculator, EdenMath, ESBCalc, Mathdroid, Calculairum, GlassCalc, CrossCalc, MyCalc2, Linux Extcalc, ThinkCalculator, Getcalc, MochiMicho Calculator, Calc98, FinKit, Rule of 3 Calculator, Numeric Notes, TTCalc, Arithmate Pro Calculator, errProof are some alternatives to Qalculate!.