Competing Definitions

  Cygwin Tools  [hits=1 votes=1 rating=5.0] : Cygwin Information and Installation - If you have UNIX experience, you MUST have these shell command-line tools for Windows. Cygwin is a UNIX environment, developed by Red Hat, for Windows. It consists of two parts: A DLL (cygwin1.dll) which acts as a UNIX emulation layer providing substantial UNIX API functionality. A collection of tools, ported from UNIX, which provide UNIX/Linux look and feel. GNU + Cygnus + Windows = cygwin (TM).
  Cygwin Tools  [hits=1 votes=1 rating=5.0] : sources.redhat.com: Free software! Get your fresh hot free software! - If you have UNIX experience, you MUST have these shell command-line tools for Windows.