I have found some inconsistencies with regards to the actual license for VietPad. The references are:
* http://vietpad.sourceforge.net/ --> Pointing to GPL 3.0 license --> http://www.gnu.org/copyleft/gpl.html
* http://sourceforge.net/projects/vietpad/ --> Pointing to GPL 2.0 License (broken link) --> http://sourceforge.net/directory/license:gpl/
For matter of commercial software implementation, the GPL version 2.0 is internally allowed to be used but not GPL 3.0.
Can you please confirm if we can rely on GPL 2.0 license for our commercial application?
Thanks a lot!