An operating system
built from scratch.

Its own kernel. Its own C library and cross toolchain. Its own desktop, its own package manager, its own installer. AnotherOS is not a Linux distribution and not a Linux fork — it exposes the Linux syscall ABI faithfully enough that unmodified GTK, Qt and WebKit run on it, and everything below that line is original.

See what it does Screenshots

The Fasadas desktop running on AnotherOS

979,669 lines of C, written for this system
1,983 source files across kernel and userland
128 third-party packages ported to it
zero lines of Linux kernel in the kernel

Own everything

Not a distribution.
Not a fork.

The kernel is original: long mode, four-level paging, SMP, a MuQSS scheduler with LAPIC preemption, demand paging, copy-on-write fork, an OOM killer, and a TCP/IP stack with real congestion control. Linux drivers are ported through a LinuxKPI compatibility layer — the kernel around them is not.

x86_64, Limine via Multiboot2, on BIOS and UEFI
ext2/3/4, SquashFS, OverlayFS, NFSv3, ISO9660, FAT
USB UHCI, OHCI, EHCI and xHCI
802.11 soft-MAC with WPA2-PSK and CCMP, written from scratch
a kernel debugger speaking the GDB remote protocol over UDP

The full picture

Fasadas

A desktop of its own.

Fasadas is the compositor and window server; Kvarcas is the 2D engine beneath it; Plintusas is the dock. Windows, menus and controls are drawn by one theme — Vanduo — so a checkbox in one application cannot drift from a checkbox in another. Buffers move between client and compositor by memfd, zero-copy.

Wikipedia running on Firefox

Wikipedia running on Firefox. AnotherOS build #1938
Notifications on AnotherOS

Notifications center with sticky notes running on AnotherOS. Build #1989
Automatic updates

Testing automatic updates service on AnotherOS build #1989
Fasadas desktop

Fasadas desktop running terminal with htop, AMonitor, sticky notes and notification center.
Desktop expose

Desktop expose experimental concept running on AnotherOS build #2115
Installing AnotherOS

Installing AnotherOS, build #2139

All screenshots Watch it run

The Linux ABI, honestly implemented

Real software.
Not a demo.

Because the syscall interface is faithful, the software stack is the real one: musl, BusyBox, bash, GTK3, Qt6, WebKitGTK, Mesa. Firefox has been ported and opens TLS connections over the system's own TCP stack. The package tree is 128 ports deep.

a GoboLinux-style versioned layout: /Apps/<Name>/<Version>
apkg installs atomically and rolls back by flipping a symlink farm
packages are SHA-256 verified and ed25519 signed
the ISO is the whole system — a SquashFS root over a RAM tmpfs, no second disk

On real machines

It boots on metal.

Not only in QEMU. A Dell Lynx Point laptop, a MacBookPro8,3 that netboots over BSDP, an Acer AO722, a Panasonic CF-H2 tablet — with hardware acceleration, working networking, and kernel panics photographed honestly along the way.

Wifi extended information (alternative mode) on AnotherOS build #1975
First successfull boot of AnotherOS build #2095 on Apple Macbook 2017 12"
Battery extended info (alternative tray mode) shows more detailed information on AnotherOS build #2115
GPU Acceleration achieved on Macbook 2017 12", AnotherOS build #2199
Firefox with webgl2 hardware acceleration works on AnotherOS build #2199 on macbook 2017 12"
The loader on a real machine.