Numdiff
Copyright (C) 2005-2007 - Ivano Primi <ivprimi (at) libero (dot) it>
(which is also the author of the program)

Note:

Numdiff includes source code from 

GNU BC 1.06, Copyright (C) 1991, 1992, 1993, 1994, 1997, 2000 
Free Software Foundation, Inc.

and from

GNU C Library, Copyright (C) 1989-1994,1996-1999,2001,2003,2004
Free Software Foundation, Inc.

