build2 is an open source (MIT), cross-platform build toolchain for developing and packaging C++ code. It is a hierarchy of tools that includes the build system, package dependency manager (for package consumption), and project dependency manager (for project development). Key features: * Next-generation, Cargo-like integrated build toolchain for C++. * Covers entire project life cycle: creation, development, testing, and delivery. * Uniform and consistent interface across all platforms and compilers. * Fast, multi-threaded build system with parallel building and testing. * Archive and version control-based package repositories. * Dependency-free, all you need is a C++ compiler.