We are proud the announce the first preview release of Casper (1.0b1). Please visit the Casper homepage for download. http://www.mcs.anl.gov/project/casper/ Casper is a process-based asynchronous progress model for MPI one-sided communication. It allows the user to keep aside a small number of cores on a multicore or many-core environment as "ghost processes," which are dedicated to help asynchronous progress for user processes through appropriate memory mapping from those user processes. Casper is designed as an external library through the PMPI name-shifted profiling interface of MPI, it can transparently link with most MPI implementation that supports MPI-3.0 RMA features. Best Regards, The MPICH team