Windows Calculator, Google Calculator, Soulver, SpeedCrunch, RealCalc Scientific Calculator, GetBricksApp, Parsify® for Desktop, Convertbot, NoteCalc, PCalc, Microsoft Calculator Plus, Precise Calculator, handyCalc, Caligator, galculator, Derivative Calculator, Free Currency Converter, Calcbot, fxSolver, Excalibur, Sticky Calculator, SpeQ Mathematics, Napkin Calculator and Notepad, Engineering Calculator, Integral Calculator, NumWorks Graphing Calculator, Moffsoft FreeCalc, Numbat, Qalculate!, Microsoft PowerToy Calc, GeoGebra Scientific Calculator, OpalCalc, Omni Calculator, Notepad Calculator, Math42, Qaltex, Multi Share Calculator, Calcbar, Abacus, Ruvenss Calculator, Standard Deviation Calculator, Algebra Calculator, Online Terminal Calculator, makina, Calculate, HEXelon MAX, A to Z Converter, ECW Expression Calculator, Getmathcharts.com, CalcBuddy Calculator, kanakku, EBTCalc, Real Time Calculator, ESBCalc, Mathdroid, NekoCalc Notepad Calculator, CrossCalc, XCALC, MyCalc2, Convertr, Calculator plus1, Linux Extcalc, MochiMicho Calculator, Calc98, FinKit, Rule of 3 Calculator, Numeric Notes, TTCalc, Arithmate Pro Calculator, errProof are some alternatives to Numi.