GNU Lesser General Public License
From Apache OpenOffice Wiki
The GNU Lesser General Public License (LGPL) is a Free software license, allowing you to use the software / document / art work without any licensing fees.
You may redistribute the product as long as you provide the license text (or a link to the license text) with the software package - and you may modify it as long as it stays under this license in your work.
In contrary to GPL it is possible to combine the product with closed source licensed parts (like libraries).
LGPL is now the only license of OpenOffice.org - before version 2.0 in combination with Sun's SISSL.
