  We present the Lattice QCD application CL2QCD, which is based on OpenCL and
can be utilized to run on Graphic Processing Units as well as on common CPUs.
We focus on implementation details as well as performance results of selected
features. CL2QCD has been successfully applied in LQCD studies at finite
temperature and density and is available at
http://code.compeng.uni-frankfurt.de/projects/clhmc .
