Nikon

NEF
Nikon Electronic Format. Nikon 12/14-Bit-RAW digital image format for DSLR cameras.
 * Download NEF codec (Windows only)
 * C-source of NEF reader from Dave Coffin's homepage

NRW
Nikon RAW. 12-Bit-RGB-CCD-RAW digital image format for Coolpix cameras.
 * Download NRW codec (Windows only)

NDF
Nikon Dust File.
 * C-source of NDF reader from Dave Coffin's homepage