Apart from individual plots contained in papers and presentations, there has so far not been any central database where people can quickly see how tune X of version Y of generator Z looks on distribution D. The idea with mcplots is to provide such a repository. A first public version of the site was unveiled at the LHC UE/MB working group meeting last week at CERN. The contents so far span min-bias, underlying events, jets, Drell-Yan, and LEP distributions, showing the Herwig++, Pythia 6, Pythia 8, Sherpa, and Vincia generators. More plots, generators, and tunes are constantly being added, so check back or write the developers if you don't find what you're looking for. The site is developed as a collaboration between CERN TH, MCnet, CERN's Generator Services Project, and the LPCC.
Support is available to fund short-term stays at CERN to incorporate new analyses, new tools, or other new features on the site. Write to P. Skands (peter.skands.AT.cern.ch) if you are interested in this possibility.