I would find an Adobe Bridge alternative immensely valuable. The features I most use in Bridge are:
the 'folders' window, the 'metadata' window, and the 'filter' window. And I use the 'batch rename' and batch process in PhotoShop.
These functions are the best at what they do I have yet seen, but if I'm going to DUMP Adobe I'll need to replace Bridge, too. I use Canon DPP for RAW conversion (it's far and away the best for Canon files) and it could mostly work in a pinch, but it's kinda limited.
Please please please bring us this!
ps — And I should add: I happily use folders, and don't need OR WANT Light Room style collections and 'Import to library'!!!