personal-os
A mock operating system that runs in the browser — a kernel, a window manager, a shell with thirty-two commands, and seven apps. You can boot it from here.
Slackware is what started this. I wanted to take UNIX's mechanism-over-policy split and find out how far I could push it, and learn how an operating system actually fits together while I was at it.
So the kernel keeps three things: a virtual filesystem, a process table, and an event bus. The window manager, the shell, and the apps are written against those three. An app reaches the kernel only through a syscall, and only for what its manifest declared.

The filesystem is this site's own content/ file so most of this site contents has a reacheable endpoint in the OS. Check it out!
There is no phone layout yet.