PhotoRaw for iOS is a viewer and developer for image files in raw format. Raw file formats from most camera manufacturers are supported, for example Nikon NEF files, Canon CR2 files, Leica DNG files, etc – see the product web site for a full list of supported cameras. PhotoRaw allows you to view these files at full 1:1 pixel resolution, even 16 mega-pixel plus images such as from a Nikon D3x or a Leica M9.
This app has just been updated for iPhone 5 and iOS 5 it is very much faster and imports take half the time. You can now also view and adjust raw image files 1:1, you can view EXIF and GPS data.
This is a free update if you have previously downloaded this app. If not, you can download it here. It retails for $9.99/£5.99/download.