License
BALL is mostly being distributed under the Lesser GNU Public License (LGPL). Parts of BALL (BALLView) are under the GNU Public License (GPL)
These license enable you to use BALL in your projects with having to disclose your source code as well. Details of the license can be found in the LICENSE file in the BALL source directory. Additional details on the GNU licenses, their use and limitations are readily available from the Open Software Foundation .