The JobListings product is a stand-alone job listing board. Jobs can be managed through the Zope Management Interface, or by using dtml forms included with the distribution.
Currently, the product is very U.S.-centric. It uses States in some fields, and doesn't have a country field. Anyone with some competence with python and DTML should be able to customize the product to suit their needs. (See state_list in JobEntry.py and state_names_list in JobListings.py.)