What licence does Lucee use?
Lucee uses the GNU Lesser General Public licence version 2.1 or as it is more commonly known, LGPL v2.1.
I'm not a lawyer, please explain LGPL
There is a pretty good explanation here and even why you shouldn't use the LGPL. The 4cff.org also has an excellent PDF explaining licensing in general.
Can I host a non-commercial or a commercial website using Lucee?
Can I provide non-commercial or commercial hosting using Lucee?
Can I create my own Lucee installer for non-commercial or commercial purposes?
Can I include Lucee on a CD / DVD / BluRay Media?
Can I embed Lucee in my non-commercial or commercial application?
Yes, provided that you've left the licence and source intact.
Can I modify the source of Lucee?
If you modified the source, you must provide us a patch of what was modified.