DNG Viewer is freeware and do not ask for any registration or fee.
Drag a RAW/MLV/ DNG file onto the window to view that file. Drag a WAV file to play with the current video. Step forward and backward through View. dng file in Windows 7.
FREE DNG Viewer - free software that opens, view, resize and convert Digital Negative .dng) image files to other, more popular image formats .bmp,.jpg,.gif.