CPS Maintainer: Chulwoo Jung (chulwoo[at]bnl[dot]gov)
Source code:     repository
Reference to cite
Level 3 optional: MDWF
Level 2 QDP and QIO are included
Level 1 QMP

CPS is developed for lattice QCD and written by C++, with some machine-specific assembly routines. It is being developed by members of Columbia University, Brookhaven National Laboratory and UKQCD. 
For more information on CPS,   please refer to github CPS page