Apache License, Version 2.0
GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.
GNU General Public License version 2
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.
BSL-1.0
CC0 1.0 Universal
CC0 License