These modules should reside in the modules directory of the installation, most commonly profiles/os2web/modules/, but alternativly in sites/all/modules (This could be for development purposes).
See https://github.com/syddjurs/os2web/wiki for further instructions.
OS2Web is Copyright (c) 2012 Syddjurs Kommune, Denmark
OS2Web is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
OS2Web is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with this program. If not, see http://www.gnu.org/licenses/.