Hi Intan,
You may read about non-commercial and commercial licenses here: http://www.jqwidgets.com/license and here: http://www.jqwidgets.com/download. There is no difference in terms of number of widgets, functionality, etc. You have to purchase a license in case you want to use our widgets for building a commercial website or a commercial project, company website, internal project. If you want to create just a personal website or a blog, you can use the non-commercial version under the terms written on our website and of course in the License Agreement.
Best Regards,
Peter Stoev
jQWidgets Team
http://www.jqwidgets.com