Nightlight is now available on iTunes
Nightlight is a new desktop application for Mac whose aim is to bring a modern interface to FITS files,with the polish and design people expect from applications they use every day.
Nightlight uses the header to identify the source of the file (e.g. the SDSS survey), and uses the appropriate logo for the file when possible. Nightlight’s file browser graphically presents FITS files as a list of HDUs.