The following links (except opencup.org) are no long available. If you are looking for graphic user interfaces (GUIs) for running R. My advice is “Don’t”. One needs to learn to code one way or another. If you insist on working with GUIs, then you would probably find R commander , Jamovi, RKWard, Deducer,Blueskystatistics,Rattle useful. GUI softwares for R are often limited in their support for specialized R libraries. Make sure the R libraries you want are included in those GUI packages.