Source: http://www.kernel.org/pub/software/network/ethtool/

Files: amd8111e.c
Copyright: 2003, Advanced Micro Devices Inc.
License: GPL-2
 This program is free software; you can redistribute it
 and/or modify it under the terms of the GNU General Public
 License as published by the Free Software Foundation;
 version 2 of the License.
 .
 This program is distributed in the hope that it will be
 useful, but WITHOUT ANY WARRANTY; without even the implied
 warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
 PURPOSE.  See the GNU General Public License for more
 details.
 .
 You should have received a copy of the GNU General Public
 License along with this package; if not, write to the Free
 Software Foundation, Inc., 51 Franklin St, Fifth Floor,
 Boston, MA  02110-1301 USA
 .
 On Debian systems, the full text of the GNU General Public
 License version 2 can be found in the file
 `/usr/share/common-licenses/GPL-2'.

Files: de2104x.c
Copyright: 2001, Sun Microsystems (thockin@sun.com)
License: GPL-2

Files: e100.c e1000.c
Copyright: 2002, Intel Corporation
License: GPL-2

Files: ethtool-copy.h
Copyright: 1998, David S. Miller (davem@redhat.com)
           2001, Jeff Garzik <jgarzik@pobox.com>
           2001, Sun Microsystems (thockin@sun.com)
           2002, Intel (eli.kupermann@intel.com)
           2001, Sun Microsystems (thockin@sun.com)
           2002, Intel (scott.feldman@intel.com)
License: GPL-2

Files: internal.h
Copyright: 2001, Sun Microsystems (thockin@sun.com)
           2002, Intel (scott.feldman@intel.com)
License: GPL-2

Files: ethtool.8.in
Copyright: 1999, David S. Miller
           2001, Sun Microsystems
           2007, 2009, Free Software Foundation, Inc.
License: GPL-2

Files: ethtool.c
Copyright: 1998, David S. Miller (davem@dm.cobaltmicro.com)
           2001, 2008, Sun Microsystems
           2001, Jeff Garzik <jgarzik@mandrakesoft.com>
           2002, Intel
           2009, 2010, Solarflare Communications
License: GPL-2

Files: fec_8xx.c
Copyright: 2004, Intracom S.A.
License: GPL-2

Files: ibm_emac.c
Copyright: 2004, 2005 Zultys Technologies
License: GPL-2

Files: igb.c
Copyright: 2007, Intel Corporation
License: GPL-2

Files: ixgb.c
Copyright: 2006, Intel Corporation
License: GPL-2

Files: ixgbe.c
Copyright: 2007, Intel Corporation
License: GPL-2

Files: marvell.c
Copyright: 2004, 2006, Stephen Hemminger <shemminger@osdl.org>
License: GPL-2

Files: natsemi.c
Copyright: 2001, Sun Microsystems (thockin@sun.com)
License: GPL-2

Files: pcnet32.c
Copyright: 2004, IBM Corporation (jklewis@us.ibm.com)
License: GPL-2

Files: realtek.c
Copyright: 2001, Sun Microsystems (thockin@sun.com)
License: GPL-2

Files: rxclass.c
Copyright: 2008, Sun Microsystems
License: GPL-2

Files: sfc.c
Copyright: 2010, Solarflare Communications Inc.
License: GPL-2

Files: stmmac.c
Copyright: 2007-2009, STMicroelectronics Ltd
License: GPL-2

Files: test-cmdline.c, test-common.c
Copyright: 2011, Solarflare Communications Inc.
License: GPL-2

Files: vioc.c
Copyright: 2006, Fabric7 Systems, Inc
License: GPL-2

Files: debian/*
Copyright: 2001-2005, Eric Delaunay <delaunay@debian.org>
           2006-2010, Anibal Monsalve Salazar <anibal@debian.org>
           2008-2011, Ben Hutchings <ben@decadent.org.uk>
License: GPL-2