The European Exascale Software Initiative (EESI) is building a European vision (contrast this with the international vision of the IESP) and roadmap to address the software and applications challenges that exascale (and other extreme scale computers) will present.
According to the EESI’s website, “coordination with the International Exascale Software Project (IESP) launched by The Department Of Energy (Office of Science), National Science Foundation and Department Of Defense is planned,” and the leadership of the International Exascale Software Project is expected to be involved with the EESI.
From workshop announcement: