What libraries or tools based on C++ do you use in your projects?

In C# projects, there is sometimes a need to use high-performance or low-level components written in C++. For this, the following C++ libraries and tools are often used:

• Boost — a set of powerful libraries that extend the standard C++ library. Used for working with threads, smart pointers, regular expressions.
• OpenCV — for image processing and computer vision, especially if the project involves visual data analysis.
• Protobuf (Protocol Buffers) — for data serialization, particularly when interacting between services.
• C++/CLI — a bridge between C# and C++, allowing the creation of wrappers around native code.

Example of using C++/CLI to call native C++ code from C#:

// C++/CLI wrapper
public ref class Wrapper {
public:
    int Add(int a, int b) {
        return a + b; // call to native code
    }
};

// C# code
var wrapper = new Wrapper();
int result = wrapper.Add(3, 4);