MSYS2 (Minimal SYStem 2) is a software distribution and building platform for Windows. Key points: Provides Unix-like environment for Windows Based on modern Cygwin and MinGW-w64 Package management via Pacman (from Arch Linux) Supports building native Windows applications Includes up-to-date toolchains (GCC, Clang) Easy installation of development tools and libraries Regularly updated repositories Useful for cross-platform development Integrates well with Windows ecosystem Popular for building and running open-source software on Windows MSYS2 is particularly valuable for developers who need Unix tools and a Unix-like environment on Windows, especially for compiling and running open-source software.