Most of the code here is licensed under the LGPL.  There are exceptions that
have their own licenses, listed below.  See comments in those files for more
details.  

util/getopt.* is getopt for Windows
util/murmur_hash.cc
util/string_piece.hh and util/string_piece.cc
util/double-conversion/LICENSE covers util/double-conversion except the build files
util/file.cc contains a modified implementation of mkstemp under the LGPL
util/integer_to_string.* is BSD

For the rest:

    KenLM is free software: you can redistribute it and/or modify
    it under the terms of the GNU Lesser General Public License as published
    by the Free Software Foundation, either version 2.1 of the License, or
    (at your option) any later version.

    KenLM 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 Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public License 2.1
    along with KenLM code.  If not, see <http://www.gnu.org/licenses/lgpl-2.1.html>.