It is the core layer for WET. Written in Ruby, a full fledged Object oriented scripting language, the core layer is the one responsible for doing the actual automation of the web application.

WET Core is licensed using a BSD license :

Copyrights (C) 2005-2006 Qantom Software, 2006 Qantom Software Pvt. Ltd
All rights reserved.

Redistribution and use in source and binary forms, with or without 
modification, are permitted provided that the following conditions are met:

Redistributions of source code must retain the above copyright notice, 
this list of conditions and the following disclaimer. 
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. 
Neither the name of Qantom Software 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.

(based on BSD Open Source License)

WET UI is a power assistant to WET. This is a dotnet application which assists the tester in creating WET scripts. This is covered by LGPL. The full version of LGPL2.1 can be viewed by clicking here The gist of the license is as given below:

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Copyright (c) 2005 - 2006, Qantom Software
Copyright (c) 2006, Qantom Software Pvt Ltd. 
All rights reserved.

This application is free software; you can redistribute it and/or modify it under 
the terms of the GNU Lesser General Public License as published by the 
Free Software Foundation; either version 2.1 of the License, or (at your option) 
any later version.

This application is distributed in the hope that it will be useful, but without any 
warranty; without even the implied warranty of merchantability or fitness for a 
particular purpose. See the GNU Lesser General Public License for more details.

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