LICENSE.txt

  GLUI User Interface Toolkit 
  ---------------------------

  (The ZLIB License)

  This software is provided 'as-is', without any express or implied 
  warranty. In no event will the authors be held liable for any damages 
  arising from the use of this software. 

  Permission is granted to anyone to use this software for any purpose, 
  including commercial applications, and to alter it and redistribute it 
  freely, subject to the following restrictions: 

  1. The origin of this software must not be misrepresented; you must not 
  claim that you wrote the original software. If you use this software 
  in a product, an acknowledgment in the product documentation would be 
  appreciated but is not required. 
  2. Altered source versions must be plainly marked as such, and must not be 
  misrepresented as being the original software. 
  3. This notice may not be removed or altered from any source distribution. 


  History of GLUI's License:
  --------------------------
  Originally, GLUI was licensed under LGPL because Paul Rademacher
  just wanted something that was very permissive, and LGPL was the
  thing he had heard of.  I discussed the license with Paul at
  SIGGRAPH 2006, where he told me the above, and also told me he was
  supportive of changing the license to one of the less restrictive
  open source licenses.  So after contacting all the authors to get
  their OK, GLUI is now under the ZLIB license.

  Bill Baxter -- November 2007