Rychu 

Easy to use library for validating Polish NIP numbers: string nip = "8674068337"; bool isValid = Rychusoft.Validators.NipValidator.IsValid(nip);

Easy to use library for validating Polish PESEL numbers: string pesel = "44051401458"; bool isValid = Rychusoft.Validators.PeselValidator.IsValid(pesel);

Easy to use library for computing math formulas, mean and proportion. Is a basis of Rychusoft.NumericalLibraries. var calc = new Calculator("8^2+5-cos(2*PI)"); var result = calc.Compute(); // result = 68"

Easy to use library for computing derivative and function value at given point. var derivative = new Derivative("x^2 + 5 - cos(2 * PI * x)"); var result = derivative.ComputeDerivative(1); // result = 2

Set of Bessel's functions for Rychusoft.NumericalLibraries suite

Easy to use library for computing differential equations. var math = new Rychusoft.NumericalLibraries.Differential.Differential(""3*x^2-5""); var result = math.ComputeDifferential(4, 2, 0); // result = 46

Library for computing function interpolation and approximation

Chart component for Rychusoft.NumericalLibraries suite

Easy to use library for validating Polish REGON numbers: string regon = "575064641"; bool isValid = Rychusoft.Validators.RegonValidator.IsValid(regon);

Library for computing fourier transform

Library for computing linear equations

Easy to use library for computing integrals. var math = new Integral("3*x^2-5", 5, 10); var result = math.ComputeIntegral(); // result = 850

Easy to use library for computing zero (root) of a function. var math = new FunctionRoot.Hybrid("(x+1)^2-9", 0, 1.5); var result = math.ComputeHybrid(); // result = 2

Common library for Rychusoft.NumericalLibraries suite

Easy to use library for measuring execution times of code sections: var execution = ExecutionTimeCounter.Start("SLEEP EXECUTION"); Thread.Sleep(5); ExecutionTimeCounter.Stop(execution); var result = ExecutionTimeCounter.ResultsToString(); Console.WriteLine(result);