The overal pimcore project is licensed under the terms of a modified BSD Licence. By using pimcore you have to be aware and have to accept and respect that the pimcore distribution includes several third-party Open-Source libraries, which are licensed under their respective Open-Source licenses.
License: GPLv3
pimcore includes the GPLv3 version of the ExtJS JavaScript framework.
http://www.sencha.com/license/
License: New BSD License
http://framework.zend.com/license
License: MIT or GPLv2
http://jquery.org/license
License: MIT License
http://symfony.com/license
License: LGPL / GPLv2 / MPL
http://ckeditor.com/license
License: MIT
http://www.opensource.org/licenses/mit-license.php
License: MIT
https://raw.github.com/sstephenson/prototype/master/LICENSE
License: Apache 2.0
http://www.opensource.org/licenses/Apache-2.0
License: LGPL http://opensource.org/licenses/lgpl-license
License: Modified BSD License http://code.google.com/p/sabredav/wiki/License
License: MIT
http://opensource.org/licenses/mit-license.php
License: Creative Commons Attribution 2.5 License http://www.famfamfam.com/lab/icons/silk/