The Lean Mean C++ Option Parser handles the program arguments (argc, argv). It supports the short and long option formats of getopt(), getopt_long() and getopt_long_only() but has a more convenient interface. It is a freestanding, header-only library with no dependencies, not even libc or STL. It comes with a usage message formatter that supports column alignment and line wrapping, making it ideal for localized messages with different lengths.