What app should I use to actually write the system?

• obsidian-releases

  1,654 8,056 9.9 JavaScript

  Community plugins list, theme list, and releases of Obsidian.

  

Personally, I really like Obsidian for this. It makes it easy to do back-links and link between sections. Obsidian is also very light-weight so it runs more smoothly than a huge Word document. Obsidian also lets me use custom CSS to display the way I like so I can write in dark-mode. That said, I was already using Obsidian for note-taking so I didn't have to learn a new interface.

• DND-5e-LaTeX-Template

  33 1,384 0.0 TeX

  LaTeX package to typeset material for the fifth edition of the "world's greatest roleplaying game".

  

Use Overleaf, once you know Latex you can create easily a decent write up, especially when you use DND-5e-LaTeX-Template as a basis.

• SurveyJS

  surveyjs.io featured

  Open-Source JSON Form Builder to Create Dynamic Forms Right in Your App. With SurveyJS form UI libraries, you can build and style forms in a fully-integrated drag & drop form builder, render them in your JS app, and store form submission data in any backend, inc. PHP, ASP.NET Core, and Node.js.

  

• TiddlyWiki

  273 7,713 9.6 JavaScript

  A self-contained JavaScript wiki for the browser, Node.js, AWS Lambda etc.

• Visual Studio Code

  2,845 158,365 10.0 TypeScript

  Visual Studio Code

  

I use a raw text editor (VS Code), and format everything in markdown, it looks like this

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