I collect these novelty CSS things for fun! here https://github.com/sw-yx/spark-joy/blob/master/README.md#fun...

- [NES.css](https://github.com/nostalgic-css/NES.css): NES.css is a NES-style(8bit-like) CSS Framework.

- [PSone.css](https://github.com/micah5/PSone.css): PS1 style CSS Framework, inspired by NES.css.

- [LaTeX.css](https://latex.now.sh/)

- Operating System CSS

  - [98.css](https://github.com/jdan/98.css): A Windows 98 inspired framework for building faithful recreations of old UIs.

    - [Office 97 clipart in svg format](https://archive.org/details/mso97clipart)

  - [XP.css](https://github.com/botoxparty/XP.css): A Windows XP inspired framework for building faithful recreations of operating system GUIs. An extension of 98.css.

  - [7.css](https://khang-nd.github.io/7.css/)

  - [System.css](https://sakofchit.github.io/system.css/) Retro Apple-inspired UI

  - [Commodore 64 CSS](http://pixelambacht.nl/2013/css3-c64/)

  - DOS: [BOOTSTRA.386](https://github.com/kristopolous/BOOTSTRA.386): A vintage 1980s DOS inspired Twitter Bootstrap theme

- [Text UI CSS](https://github.com/vinibiavatti1/TuiCss): bios like UI's

- [New Dawn](https://github.com/npjg/new-dawn): A mac classic After Dark inspired stylesheet.

- [Geocities Bootstrap theme](https://code.divshot.com/geo-bootstrap/)

- more https://dev.to/iainfreestone/10-resources-for-recreating-old...

BIOS like UI is Turbo Vision framework https://en.wikipedia.org/wiki/Turbo_Vision - one of the earliest windowed application frameworks. Not GUI framework, obviously. Made by Borland and made famous by its IDEs like Turbo C++ and Turbo Pascal.

Nowadays available as open source: https://github.com/magiblot/tvision