Quoted from the homepages:

  • UnxUtils: Here are some ports of common GNU utilities to native Win32. In this context, native means the executables do only depend on the Microsoft C-runtime (msvcrt.dll) and not an emulation layer like that provided by Cygwin tools.
  • GnuWin32: GnuWin32 provides Win32 (MS Windows 95 / 98 / ME / NT / 2000 / XP / 2003 / Vista) ports of tools with a GNU or similar open source license.

A long time ago, Free.fr released within their connection CD a bundle of various UNIX tools 4 Windows.