worldcat.org
It’s probably no news to you that worldcat.org is now open: all of the OCLC’s enormous union catalogue, WorldCat, is available for your searching. It has lots of features, so explore it if you haven’t already. The editions/manifestations groupings are there as before: look at The Three Musketeers (the 1991 Oxford World’s Classics manifestation, ISBN 0192827510) and follow the “Editions” tab to see other manifestations of the same work. If you browse around or search you’ll see faceted search refinements on the left-hand side and language facets in a top navigation bar. A fantastic resource. Congratulations to OCLC for their work on this.