Hey! I’ve been working on a project called TeCSi (Terminal emulation C Sharp interface). It’s a C# terminal-based OS simulation that I’ve been developing since August.
It started as a tiny project and has gradually grown to include users, permissions, a virtual filesystem, applications, and now real filesystem I/O.
KDE has been one of the things that inspired me while working on it, so I figured I’d share it here and see what people think. 
Feel free to fork it if you want, and please abide by the source license when making mods. All permissions are granted, except for advertisement. I say “please” because TeCSi is an independent, unofficial project and is not affiliated with KDE
Be aware that TeCSi has a personality (kinda)