The DMOZ database/editing software is closed source (although Richard Skrenta has said in June 1998 that he was considering licensing it under the GNU General Public License).
Database ODP/perangkat lunak penyunting merupakan sumber tertutup, meskipun Richard Skrenta dari ODP mengatakan pada bulan Juni 1998 bahwa ia sedang mempertimbangkan lisensi dibawah GNU General Public License.