nuttx/COPYING

COPYING -- Describes the terms under which Nuttx is distributed. A
copy of the BSD-style licensing is included in this file. In my
words -- I believe that you should free to use NuttX in any
environment, private, private, commercial, open, closed, etc.
provided only that you repect the modest copyright notices as
described in license (below).  Please feel free to contact me if you
have any licensing concerns.

License for NuttX in general (authorship of individual files may vary):
/*************************************************************************
 * 
 *   Copyright (C) 2007-2010 Gregory Nutt. All rights reserved.
 *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions 
 * are met:
 * 
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 * 3. Neither the name NuttX nor the names of its contributors may be
 *    used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 
 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN 
 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *
 *************************************************************************/

Some networking components of NuttX derive from uIP which has a similar
BSD style license:

   Copyright (c) 2001-2003, Adam Dunkels.
   All rights reserved.

IGMP support, if enabled in uIP, adds additional logic by Steve Reynolds:

  Copyright (c) 2002 CITEL Technologies Ltd.
  All rights reserved.

Certain functions in the NuttX C-library derive from other BSD-compatible
sources:

strtod():

  Copyright (C) 2002 Michael Ringgaard. All rights reserved.
  Copyright (C) 2006-2007 H. Peter Anvin.

dtoa():
  If you enable floating point conversions with CONFIG_LIBC_FLOATINGPOINT,
  then some files with an unmodified BSD license will be included.  That
  license is similar to the above (modified) BSD license, but has an
  additional requirement that I state the following:

  "This product includes software developed by the University of
   California, Berkeley and its contributors."