DM Bible is a OneNote-based gamemaster notebook by Icarus Games:
You can either browse the notebook online or download a copy of your own.
https://www.icarus-games.co.uk/onenote-dm-bibleMy OneNote DM Bible is the culmination of more than 18 months of work. It contains everything you need to organize your RPG campaign, including character sheets for the fifth edition of the World's Greatest Role-playing Game.
Inside the OneNote DM Bible you'll also find templates for NPCs, Factions, Locations, Calendars, Pantheons, and much more.
You can either browse the notebook online or download a copy of your own.