The OGDF is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License Version 2 or Version 3 as published by the Free Software Foundation.
In addition, as a special exception, you have permission to link this software with
- the libraries of the COIN-OR Osi project;
- all libraries required by Osi; and
- all LP-solver libraries directly supported by the COIN-OR Osi project,
and distribute executables, as long as you follow the requirements of the GNU General Public License in regard to all of the software in the executable aside from these third-party libraries.
Moreover, we grant a special exception to the OGDF QML plugin by Christoph Schulz (licensed under the GNU Lesser General Public License) for linking OGDF and distributing the plugin under LGPL v2 or v3.
If you have further questions, please contact us.