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KolibriOS nightly build desktop
Developer KolibriOS Project Team
Written in Fasm
Working state Active
Source model Open source
Latest release r6975 / September 13, 2017; 12 months ago (2017-09-13)
Available in English, Russian, Italian, Spanish
Platforms x86
Kernel type Monolithic
Default user interface KolibriOS Kernel API

GNU General Public License

Proprietary software[1]
Preceded by MenuetOS
Official website www.kolibrios.org

Kolibri or KolibriOS is a small open source x86 operating system written completely in assembly. It was forked off from MenuetOS[2] in 2004 and has run under independent development since.

In a review piece on alternative operating systems (2009), Tech Radar called it "tremendously impressive" noting its performance and streamlined code-base.[3]



The following list of commands is supported by the KolibriOS Shell.[4]

System requirements[edit]

  • i586 compatible CPU required
  • 8 MB of RAM[5]
  • VESA-compatible videocard
  • 1.44MB 3.5" floppy drive, hard disk, USB Flash or CD-drive
  • Keyboard and mouse (COM, PS/2 or USB)

Supported hardware[edit]

Development branches[edit]

  • KolibriACPI: extended ACPI support
  • Kolibri-A: Exokernel version of KolibriOS optimized for embedded applications and hardware engineering; only few AMD APU-based platforms are currently supported.


Dedoimedo reviewed KolibriOS in 2012:[7]

I allocated a more than sufficient 64MB of RAM to KolibriOS and let it fly. Now, to really show you how fast this thing is, I recorded a boot session. It shows the simple KolibriOS boot menu. Next, I press the Enter key. Soon thereafter, we are inside a fully functional desktop. How soon? Well, you can enjoy the video embedded below or follow the Youtube link if you hate embedded stuff. Now, keep your eyes on the screen, as the video is rather short. I mean, really, really short.

Jesse Smith from DistroWatch Weekly wrote review about KolibriOS:[8]

The application menu is broken down into familiar groupings, such as Development, Games, Data Processing, Network and Help. There are also demo programs showing off various graphics and screensavers. Programs are easy to find and most applications work well. The help documentation is a bit scattered, as it covers a number of different topics, but there doesn't seem to be a pattern to what is explained and what isn't. In short, finding help is hit or miss, but what is explained is done so clearly.


Further reading[edit]

External links[edit]