Re:SciRate: an open source website to browse, save and comme...
by capnrefsmmat on Sunday August 02, 2015 @09:03AM
(#9990596)
There is also PubPeer, which allows anonymous commenting on articles, including arXiv preprints. It has been fairly successful -- its commenters have uncovered several cases of fraud and appear to be fairly active:
https://pubpeer.com/publications/DF28B786257B8916013EC2F9CC5...