Kinematic fitting library OrcaKinFit for the Belle II experiment (https://www.belle2.org/). OrcaKinFit is based on the MarlinKinFit used in the ILC project.
OrcaKinFit is distributed under the GPLv3 License
Copyright (C), MarlinKinfit and OrcaKinFit Authors
OrcaKinFit is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License long with this program. If not, see http://www.gnu.org/licenses/.
Further information about the fit engine and the user interface provided in MarlinKinfit can be found at https://www.desy.de/~blist/kinfit/doc/html/
and in the LCNotes LC-TOOL-2009-001 and LC-TOOL-2009-004 available from http://www-flc.desy.de/lcnotes/