The SPRES non-equilibrium rare event algorithm is available for download as part of the FRESHS rare event sampling package .

Full text of the paper which gives an in-depth look at using SPRES is behind a paywall at J Chem Phys, however you will find an earlier version of the paper on arXiv, as well as the documentation on the FRESHS site.

Minimal energy clusters

The database of the minimal energy binary Lennard-Jones clusters can be accessed here.