The Nordic Data Grid Facility, NDGF, is a collaboration between the Nordic contries (Denmark, Finland, Norway, Sweden).
The motivation for NDGF is to ensure that researchers in the Nordic countries can create and participate in computational challenges of scope and size unreachable for the national research groups alone.
Today, the first operational user of the NDGF is the Nordic High Energy Physics community - the ALICE, ATLAS and CMS Virtual Organizations - through the operation of the Nordic Tier-1, which together with the Tier-0, CERN, and the other 10 Tier-1s collects, stores and processes the data produced by the Large Hadron Collider Experiment at CERN.
More information on Nordic DataGrid's own web site