I'm kidding :) Seriously, it's just my first effort in writing OS for protected mode of x86. It is quite simple and buggy, you won't see anything great for a long time.

Tools, languages and platform used:

• gcc 4.5, GNU make;
• written in C with gas assembly;
• aimed for i386 CPUs;
• loaded with GRUB, multiboot specification;

Features:

• a simplest kernel shell with few built-in commands primarily for debugging;
• built-in Lua shell with sys module;
• a subset of libc, heap management;
• preemptive multitasking demo (two example tasks running concurrently);
• simplest userspace init and syscalls;
• posix virtual filesystem (inodes, mountpoints, filelinks), ramfs;
• processes are work in progress;

Nothing more yet (no paging, no decent userland, no lot of things);

You can find a fresh image at https://dmytrish.net/d/cosec.iso

Run:

• using Qemu: qemu-system-i386 -cdrom cosec.iso;
• using http://copy.sh/v86 : choose cosec.iso as "CD image" and start emulation;
• set it as a livecd in a x86 virtual machine of your choice.

• a small wiki: https://github.com/EarlGray/COSEC/wiki ;
• a gitter chat, if you have any questions or would like to contact me: https://gitter.im/EarlGray/COSEC ;