If you are looking for a TTRPG Campaign Manager that is free, a local install and packed with TTRPG features then Obsidian.md is an absolutely amazing beast of a program.

Let me give you a quick tour of it's features that you could be using to improve the management of your games.

If you would like to know where to start and what plugins I'm using, then I have a website dedicated to helping new users out:

https://obsidianttrpgtutorials.com/

Get Obsidian https://obsidian.md/
Support Me and get access to the Foundation Vault!   / jplunkett  

00:00 Intro
00:44 What is Obsidian.md
02:06 Demo of Obsidian.md
03:15 Home Page with Dataview Tables
04:14 Map Support
04:33 Automatic Travel Time Calculation
05:07 Mind Mapping
05:45 Adventure Modules
06:22 Statblocks
07:00 Combat Management
07:57 Link Icons
08:35 Character Sheets
09:36 Templates
10:41 Add Images
11:08 Auto Populating Tables
11:20 DM Screens
11:40 Automatic Linking
12:17 More Templates
13:40 AI Support (optional)
15:15 Graph View
16:48 PDF Support
17:08 Just Folders and Files
18:41 Publish Your Notes
19:55 Table Support Is Now Great
20:44 Canvas Support Now Available
21:26 Roadmap what is Dynamic Views?
22:01 Input Fields (Calculators)
24:04 Start Your Journey