KiwiOS

KiwiOS is a fully custom, Scratch‑built operating system environment designed to run inside the Kiwi Machine — a virtual hardware layer composed entirely of sprites, archives, and handcrafted logic. Unlike traditional OS projects that rely on extensions, lists, or heavy scripting, KiwiOS is engineered around minimalism, precision, and complete control over every subsystem. Every component, from the bootloader to the UI, is intentionally built from scratch to ensure the system behaves exactly as designed, without hidden processes or unpredictable behavior.

KiwiOS is not a simulation of Windows, macOS, or Linux. It is its own ecosystem, its own architecture, and its own design language. The system uses a custom time format, a custom file archive structure, and a custom UI framework, all optimized for performance inside the constraints of the Kiwi Machine. This gives KiwiOS a unique identity: lightweight, deterministic, and mathematically clean.
Made with Scratch mod by the name of PenguinMod, alongside an extension that allows for ZIP management (opens in a new tab)
Hope u enjoy :D

docs are here (opens in a new tab)

.pmp files are PenguinMod project files (editor is here, opens in a new tab)

KiwiOS is an independent project built using the PenguinMod engine. PenguinMod is owned by its creators and is not affiliated with this project. Scratch is owned by MIT and is also not affiliated with this project.