We recently installed Crux on our cluster for researchers in the IIDMM department at UCT. Unfortunately it's not MPI aware and only runs on single cores. Additionaly the binary we downloaded did not run on the cluster due to a library mis-match. However the site allows one to apply for a free academic license to download the source code. Once we'd recompiled the software it ran just fine. Still awaiting the first results, we'll publish test images and data as they come in.