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Revision as of 19:45, 18 March 2013 by Asiekierka (talk | contribs)
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KolibriOS logo
KolibriOS desktop
Developed by: KolibriOS Project Team
License: GPL
Kernel type: Monolithic kernel
Working state: Active

KolibriOS is an open source operating system with a monolithic preemptive kernel, video drivers, for 32-bit x86 architecture computers, developed and maintained by The KolibriOS Project Team. KolibriOS is a fork of MenuetOS, written entirely in FASM (assembly language). However, C, C++, Free Pascal, Forth, among other high-level languages and compilers, can also be used in user application development.
English, Russian, Spanish and Italian versions are available.

IMPORTANT: Help KolibriOS development by working on ideas from the Google Summer of Code 2013 list!

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KolibriOS Features

  • Insanely fast. As an Assembler-coded operating system, it does not use anything beyond what it needs to run. Even VESA does not cause any slowdowns.
  • Bloatless. 90% of the software for Kolibri fits on a single floppy disk.
  • Compatible. It boots from anything, including NTFS drives and even from Windows itself. It supports FAT16/32, ext2/3/4 and CDFS. We are even compatible with NTFS!
  • Graphical. Despite being smaller than Linux's kernel, it manages to pack in a fully working graphics interface and a base of applications for you to use.
  • Easy to develop. KolibriOS comes with all the software you need to write software for it out of the box.
  • Lightweight. Kolibri runs on anything that has a Pentium and eight megabytes of RAM.
  • Comes with a development kit (code editor with FASM macro-assembler integrated).


  • Embedded version of KolibriOS - Kolibri-A
  • New network stack (Berkeley sockets-based) New stack