In reply to steve-grigg:
With the conditions this year there is a good chance that many of the big mountains will be in good shape late season. Especially the Swiss mountains.
You could add Weisshorn, Lenzspitze, Nadelhorn, Lagginhorn, Weissmies N Ridge, Dent Blanche and, of course, the Matterhorn to the above list.
Also, the big snow ridges might be good as well. For example, I did the Liskamm traverse early Sept last year and it was in perfect condition.
Best to check local conditions at the time. There's no reason that glaciers in general are impassable late season.