SimpleScheme
Copyright (c) 2011 Charles Hayden
SimpleScheme was originally based on NScheme.

NScheme
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Copyright (c) 2008-2009 Joe Chung.
A C# port of JScheme.

The NScheme license:
Microsoft Public License (Ms-PL)

This license governs use of the accompanying software. If you use the software, you accept 
this license. If you do not accept the license, do not use the software.

1. Definitions

The terms "reproduce," "reproduction," "derivative works," and "distribution" have the 
same meaning here as under U.S. copyright law.

A "contribution" is the original software, or any additions or changes to the software.

A "contributor" is any person that distributes its contribution under this license.

"Licensed patents" are a contributor's patent claims that read directly on its contribution.

2. Grant of Rights

(A) Copyright Grant- Subject to the terms of this license, including the license conditions
and limitations in section 3, each contributor grants you a non-exclusive, worldwide, 
royalty-free copyright license to reproduce its contribution, prepare derivative works of 
its contribution, and distribute its contribution or any derivative works that you create.

(B) Patent Grant- Subject to the terms of this license, including the license conditions 
and limitations in section 3, each contributor grants you a non-exclusive, worldwide, 
royalty-free license under its licensed patents to make, have made, use, sell, offer for 
sale, import, and/or otherwise dispose of its contribution in the software or derivative 
works of the contribution in the software.

3. Conditions and Limitations

(A) No Trademark License- This license does not grant you rights to use any contributors' 
name, logo, or trademarks.

(B) If you bring a patent claim against any contributor over patents that you claim are 
infringed by the software, your patent license from such contributor to the software ends 
automatically.

(C) If you distribute any portion of the software, you must retain all copyright, patent, 
trademark, and attribution notices that are present in the software.

(D) If you distribute any portion of the software in source code form, you may do so only 
under this license by including a complete copy of this license with your distribution. If 
you distribute any portion of the software in compiled or object code form, you may only 
do so under a license that complies with this license.

(E) The software is licensed "as-is." You bear the risk of using it. The contributors give 
no express warranties, guarantees or conditions. You may have additional consumer rights 
under your local laws which this license cannot change. To the extent permitted under your 
local laws, the contributors exclude the implied warranties of merchantability, fitness 
for a particular purpose and non-infringement. 

JScheme
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Copyright (c) 1998-2002 by Peter Norvig.
Permission is granted to anyone to use this software, in source or object code
form, on any computer system, and to modify, compile, decompile, run, and
redistribute it to anyone else, subject to the following restrictions:

The author makes no warranty of any kind, either expressed or implied, about
the suitability of this software for any purpose.

The author accepts no liability of any kind for damages or other consequences
of the use of this software, even if they arise from defects in the software.

The origin of this software must not be misrepresented, either by explicit
claim or by omission.

Altered versions must be plainly marked as such, and must not be misrepresented
as being the original software. Altered versions may be distributed in packages
under other licenses (such as the GNU license).