/usr/lib64/mpich/bin/analysis_example_mpich
/usr/lib64/mpich/bin/DosMain_mpich
/usr/lib64/mpich/bin/esp_mpich
/usr/lib64/mpich/bin/jx_mpich
/usr/lib64/mpich/bin/openmx_mpich
/usr/lib64/mpich/bin/OpticalConductivityMain_mpich
/usr/lib64/mpich/bin/polB_mpich
/usr/lib64/mpich/bin/test_mpi_mpich
/usr/lib64/mpich/bin/TranMain_mpich
/usr/lib64/mpich/bin/TranMain_NC_mpich
You may install this package on CentOS with
yum
install openmx-mpich