SDO is licensed under the conditions of Creative Commons Attribution-ShareAlike 4.0
International License. That means that you can share it freely and use it commercially. You can also adapt it if you share it under the same conditions.
Please show us how you made adaptions. Maybe we will integrate it into our SDO pool.
You find further informations about this license under http://creativecommons.org/licenses/by-sa/4.0/
I have tried not to violate the copyright of other authors. If that has happened I ask for forgiveness and notice - I will adapt it accordingly.