GNU Utilities for Win32 is a set of common GNU utilities native to Win32.
In this context, native means the executables only depend on the Microsoft C-runtime (msvcrt.dll) and not an emulation layer like that provided by Cygwin tools.
It includes the following utilities: bc, bison, bzip2, diffutils, fileutils, findutils, flex, gawk, grep, gsar, gzip, indent, less, m4, make, patch, recode, rman, sed, shellutils, tar, textutils, wget, which, and more.