GitHub - sebastiandagostino/integral-calculator: Definite Integral calculator using Trapezoidal Rule, Simpson's Rule and Romberg's Method
Uno Platform Ports Open Source Windows Calculator (C++) to Web/iOS/Android (C#) -- Visual Studio Magazine
GitHub - enoch-ng/Integral-Calculator: Program to calculate polynomial integrals (definite or indefinite) and sort the output. I/O is done with text files.
![C++ Function to Compute Numerical Integral Using Function Pointers | Algorithms, Blockchain and Cloud C++ Function to Compute Numerical Integral Using Function Pointers | Algorithms, Blockchain and Cloud](https://helloacm.com/wp-content/uploads/2014/11/integral_approximations.png)