Cygwin is described as 'Unix-like environment and command-line interface for Microsoft Windows. Cygwin provides native integration of Windows-based applications, data, and other system resources with applications, software tools, and data of the Unix-like environment' and is a very popular app in the os & utilities category. There are more than 25 alternatives to Cygwin for a variety of platforms, including Windows, Linux, Mac, BSD and Android apps. The best Cygwin alternative is Windows Subsystem for Linux, which is both free and Open Source. Other great apps like Cygwin are MSYS2, MinGW, WindTerm and BusyBox.