The FastPictureViewer WIC Codec Pack enables full platform support
for 20 raw formats from 13 camera manufacturers, covering about 300
camera models from Canon, Fuji, Kodak, Leica, Minolta, Nikon, Olympus,
Panasonic, Penax, Sigma, Sony and Adobe DNG.

Auto-rotated thumbnails and image metadata such as EXIF information
are displayed in Windows Explorer views while full-size image
previewing and slideshows are enabled for all supported formats in
Photo Gallery, Windows Live Photo Gallery, Win7's Photo Viewer and
Media Center and all .NET 3.x, WPF and WIC-enabled applications.

Requirements: Windows 7, Vista or XP SP3, 32-bit or 64-bit.

Cost: free.

Get it: http://www.fastpictureviewer.com/codecs/

Supported formats:

*.dng Adobe Digital Negative
*.cr2 Canon Raw Image
*.crw Canon Raw Image
*.raf Fuji Raw Image
*.3pr Hasselblad Raw Image
*.fff Hasselblad Raw Image
*.dcr Kodak Raw Image
*.kdc Kodak Raw Image
*.raw Leica Raw Image
*.rwl Leica Raw Image
*.mrw Minolta Raw Image
*.nef Nikon Raw Image
*.nrw Nikon Raw Image
*.orf Olympus Raw Image
*.rw2 Panasonic Raw Image
*.pef Pentax Raw Image
*.x3f Sigma Raw Image
*.arw Sony Raw Image
*.sr2 Sony Raw Image
*.srf Sony Raw Image