The nPose scripts are licensed under the GPLv2 (http://www.gnu.org/licenses/gpl-2.0.txt), with the following addendum:

The nPose scripts are free to be copied, modified, and redistributed, subject to the following conditions:
- If you distribute the nPose scripts, you must leave them full perms.
- If you modify the nPose scripts and distribute the modifications, you must also make you