NEMOLite2D is a stand-alone, 2D shallow-water model based on the free-surface component of the NEMO ocean model. This benchmark suite comprises several different versions of this finite-difference Fortran code, written with the aim of exploring the effect of various optimisations on performance. Serial, OpenMP and OpenACC versions are included. The suite is provided as a gzipped tar file. See the README within it for more details.NE/L012111/1