Co-array Fortran and UPC

CAF and UPC are Fortran and C extensions for the Partitioned Global Adress Space (PGAS) model.
So independent of the hardware restrictions, each processor can access (read and write) data from other processors, without the need of additional communication libraries, e.g. MPI.

HLRS provided an introductory course about this.
At the current development stage I do not clearly see the benefit for production codes. However, some ideas might be implemented more quickly with these paradigms than with ordinary MPI for testing purposes.