KolibriOS

KolibriOS, or Kolibri, is a small, open-source x86 operating system written completely in assembly. It was forked from MenuetOS in 2004 and has run under independent development since.
In a 2009 review piece on alternative operating systems, "TechRadar" called it "tremendously impressive", noting its performance and streamlined code-base.
Features.
Commands.
The following list of commands is supported by the KolibriOS Shell.
Reception.
Dedoimedo reviewed KolibriOS in 2012:
Jesse Smith from DistroWatch Weekly wrote review about KolibriOS: