File Information Tool Set
From Just Solve the File Format Problem
FITS, the File Information Tool Set, is software created at the Harvard University Library to identify, validate, and extract technical metadata for various file formats. It wraps several third-party open source tools, normalizes and consolidates their output, and reports any errors. The tools which it incorporates include JHOVE, Exiftool, National Library of New Zealand Metadata Extractor, DROID, FFIdent, and Windows File Utility.
There is no link between this took set and the long-established FITS format.