I don't see anyone mentioning Fooyin, which seems to be an attempt at being an open source clone of Foobar2000, right down to its plug in system.

Its making me feel concerned. Is there a reason foobar fans aren't using it? Do they just not know about it? Its missing a few features here and there, but the UI is so 1 to 1 that I can't imagine trying to use anything else as a replacement.