C++ tools are software utilities, frameworks, and environments designed to assist in the development, debugging, testing, and deployment of C++ programs. They include compilers (such as GCC, Clang, or MSVC), integrated development environments (IDEs) like Visual Studio or Code::Blocks, build systems (such as CMake or Make), debuggers, and performance analyzers that help streamline coding, compile-time optimization, and runtime analysis for C++ applications.