Conan is an open source, decentralized and multi-platform package manager for C and C++ that allows you to create and share all your native binaries.

Tundra is a code build system that tries to be accurate and fast for incremental builds - deplinenoise/tundra

CMake is a powerful and comprehensive solution for managing the software build process. CMake is the de-facto standard for building C++ code, with over 2 million downloads a month.