I just bought Corel AfterShot Pro (Mac) for 20 bucks from an Amazon email. Corel bought Bibble last year and upgraded their Pro to AfterShot Pro. I also received their latest update for 30 more cameras. It's Lightroom at a 97% discount and it includes Noise Ninja , which I did not have. Well worth it for that alone.
Apparently it does not open DNG at the present time. I am well aware that Corel must be blowing it out ahead of a new version, but I wanted Noise Ninja. It's similar to Aperture which I also have. Reviews are mixed on whether it's faster or slower than Lightroom but you can work on a single image without the baggage that Lightroom imposes.