sigfile
Utilities to reading signal data from files
omni-file
You got a filename/foldername we got all its info: icon, category, type, extensions, mime type, color, and more...
xit-parse
An Xit file parser written in plain JavaScript
@xwordly/xword-parser
Fast, type-safe TypeScript library for parsing crossword puzzles (PUZ, iPUZ, JPZ, XD)