As part of the work of the expert group Foreign Nationals in Prison and Probation, this overview of organisations that support their nationals abroad was collected. Some of these organisations (Prisoners Abroad (UK), Foreign office of the Probation Service (Netherlands), Irish Council for Prisoners Overseas and Italian Prisoners Abroad) are members of this expert group.
This is not an exhaustive list, rather a first overview and it would be helpful to receive information if other such organisations exist that are not yet included.