There are 3 repositories under file-formats topic.
A pure Python cleanroom implementation of libmagic, with instrumented parsing from Kaitai struct and an interactive hex viewer
A pure python module for reading and writing kaldi ark files
Panic Playdate reverse-engineering notes/tools - covers file formats, server API and USB commands
Python library for reading, writing, and converting computational chemistry file formats and generating input files.
Modules for working with Valve's Source Engine file formats.
A collection of tools for Tony Hawk's Pro Skater 2 (Neversoft Big Guns engine)
Specification and description of the MathOptFormat file format
WhoCalls can query a directory of files, find the binaries, and search for a user specified Win API import. It and works with both 32-bit (PE) and 64-bit (PE32+) file formats (.exe, .dll, .sys)
Specification and description of the StochOptFormat file format
Silent Hill Reverse Engineering File Formats
Presenting the Danish National Archives' Concept Model for Development of Preservation Plans.
A mirror of the PRONOM file format registry in Linked Open Data format. The Format Registry is a linked (open) data file format repository. The work is the result of a four-day hack during November 2013. Its goal is to influence the rapid development of further format registries and linked open data initiatives within the digital preservation community.
010 Editor templates for Mafia: The City of Lost Heaven file formats. Also partly for Hidden & Dangerous 2 and Wings of War.
A set of tools for inspecting and converting Gothic and Gothic II game files
The FreeImage library with some additional features. These include: CMake support, progress and cancelation support (partial).
Automatically transform between XML namespaces in a clever way: https://vporton.github.io/xml-boiler-docs/
Release repository for The Skeleton Test Suite. Contains an Archive of PRONOM, and skeleton files for testing DROID from The National Archives, UK.
A simple command-line tool to extract files from Vib-Ribbon's .PAK archive file format.