DXO is a software manufacturer based in Europe that sometimes slips by me, but I keep meaning to mention them on this site. DXO Optics Pro is their premiere application, having won an EISA (European Imaging and Sound Association) award for the best product of 2007-08.
The program version currently sits at 4.5, with version 5 coming out soon. The DXO package offers some neat things that aren’t available elsewhere. Specifically, DXO analyzes and quantifies the quirks, behaviours, and oddities of most major cameras and lenses and uses this product-specific information to correct images.
That means it will apply a certain type or amount of noise reduction based on your camera and the ISO used for that shot. It also means that flaws or “characteristics” of lenses are accounted for by applying optics and geometry correction specific to the lens.
I’ve heard raving reviews from pro photographers about the denoising and optic control on more than one occasion, and with the new release, DXO is primed to become a standard tool in the pro shooter arsenal.

