Covering all Plugin modules for Quick.Cart available from this site (for Image Watermark, see additional note below) ...

Copyright (C) 2006 Roger Barrett

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

This program 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 General Public License for more details - http://www.gnu.org/copyleft/gpl.html

Note : The Image Watermark plugin includes the following distributions ...

Lightbox

• Copyright (C)2006 Lokesh Dhakar - http://www.huddletogether.com
• Licensed under the Creative Commons Attribution 2.5 License - http://creativecommons.org/licenses/by/2.5/

Scriptaculous (effects)

• Copyright (c) 2005 Thomas Fuchs - http://script.aculo.us, http://mir.aculo.us
• MIT-style license , so you can use it for anything you like, as long as you include the copyright notice

Prototype JavaScript framework

• Copyright (C) 2005 Sam Stephenson - http://prototype.conio.net/
• MIT-style license : freely distributable, as long as you include the copyright notice