Hi everyone, here is a list of websites that I use for C++:
https://godbolt.org/: compiler explorer, allows you to quickly test code and see the disassembly, integrates many libraries and tools (PVS, clang-tidy, ...). It can even do CMake projects with multiple files!
Have a look at ftxui it's made for C++ with modern C++: https://github.com/ArthurSonzogni/FTXUI