NorduGrid is a collaboration aiming at development, maintenance and support of the free Grid middleware, known as the Advanced Resource Connector (ARC).

That project's main goal was to set up a prototype of a distributed computing infrastructure (a testbed), aiming primarily at the needs of the High Energy Physics researchers in the ATLAS experiment.

To further support ARC development, NorduGrid and several other interested partners secured dedicated funding through EU FP6 project KnowARC.

The NorduGrid Collaboration is the consortium behind the ARC middleware, and its key goal is to ensure that ARC is further developed, maintained, supported and widely deployed, while remaining a free open-source software, suitable for a wide variety of high-throughput Grid computational tasks.

A tit-for-tat user group is formalized as a virtual organisation (VO), allowing the mutual use of such community resources.

NorduGrid CA provides such certificates to individuals and machines associated with research and/or academic institutions in Denmark, Finland, Norway and Sweden.