Excerpt of the README from xfig/transfig - legal notice:
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THE LAWRENCE BERKELEY NATIONAL LABORATORY DISCLAIMS ALL WARRANTIES WITH
REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
AND FITNESS, IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY SPECIAL,
INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
PERFORMANCE OF THIS SOFTWARE.

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NEW COPYRIGHT/PERMISSION NOTICE:

The xfig copyright and permission notice has changed (again) slightly in
version 3.2.5.  It now states that:

	FIG : Facility for Interactive Generation of figures
	Copyright (c) 1985-1988 by Supoj Sutanthavibul
	Parts Copyright (c) 1989-2002 by Brian V. Smith
	Parts Copyright (c) 1991 by Paul King

	Any party obtaining a copy of these files is granted, free of charge, a
	full and unrestricted irrevocable, world-wide, paid up, royalty-free,
	nonexclusive right and license to deal in this software and documentation 
	files (the "Software"), including without limitation the rights to use, 
	copy, modify, merge, publish distribute, sublicense and/or sell copies of
	the Software, and to permit persons who receive copies from any such 
	party to do so, with the only requirement being that the above copyright 
	and this permission notice remain intact.

The license for 3.2.4 didn't allow selling xfig unless it was simply included in a
collection of programs (e.g. a CD) that one was selling.