Gear is free software :
You can redistribute it and/or modify it under the terms of the GNU LesserGeneral 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; withouteven the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
Note that you are free to use it for commercial project but not to sell it or any part of it. If you do any modification to the source code of gear or create any tools using the code provided with Gear (including new modules for the rigging system), you havee the OBLIGATION TO SHARE it.
For more information see the GNU Lesser General Public License