BEMLab software is protected by one of the popular open source licenses. The code and binaries are available under GNU Lesser General Public License version 3.
GNU LGPL version 3 license is distributed with the BEMLAB code and is also available at http://www.gnu.org/licenses/lgpl.html. GNU LGPL is an extension to GNU GPL which relaxes some of its conditions. GNU GPL license terms are available at http://www.gnu.org/licenses/gpl.html.
First public release was binary only. Now the source code and built binaries are availabe (see Downloads). You can redistribute BEMLAB without charges.