MrEd
Copyright (c) 1995-96 PLT, Rice University

MrEd is distributed under the GNU Library General Public License
(LGPL).  This means you can link MrEd into proprietary applications,
provided you follow the specific rules stated in the LGPL.  You can
also modify MrEd; if you distribute a modified version, you must
distribute it under the terms of the LGPL, which in particular means
that you must release the source code for the modified MrEd. See
COPYING.LIB for more information.

MrEd is based on:

  wxWindows
  Copyright (c) 1994 Artificial Intelligence Applications Institute,
                     The University of Edinburgh
  All rights reserved.

and/or

  wxWindows Xt
  Copyright (c) 1994 Artificial Intelligence Applications Institute,
                     The University of Edinburgh
  Copyright (c) 1995 GNU (Markus Holzem)
  All rights reserved.

  Therefore, the "Xt" version of MrEd is under the GNU General Public 
  License.

and

  MzScheme
  Copyright (c) 1995-97 PLT (Matthew Flatt)
  All rights reserved.

and

  libscheme
  Copyright (c) 1994 Brent Benson
  All rights reserved.

and

  Conservative garbage collector
  Copyright 1988, 1989 Hans-J. Boehm, Alan J. Demers
  Copyright (c) 1991-1994 by Xerox Corporation.  
  All rights reserved.

  C++ extension by Jesse Hull and John Ellis
  Copyright (c) 1994 by Xerox Corporation.  
  All rights reserved.

