Similar to FreeRTOS

• 

  SteamOS

  SteamOS
  
• 

  Syllable

  Syllable Desktop
  
• 

  Version 6 Unix

  Version 6 Unix
  
• 

  Version 7 Unix

  Version 7 Unix
  
• 

  Xv6

  Xv6
  
• 

  AsteroidOS

  AsteroidOS
  
• 

  Ubuntu

  Ubuntu
  ▼-1 trends

  
• 

  OpenSolaris

  OpenSolaris
  
• 

  Oberon

  Oberon (operating system)
  
• 

  Darwin (オペレーティングシステム)

  Darwin (operating system)
  
• 

  TempleOS

  TempleOS
  
• 

  DragonFly BSD

  DragonFly BSD
  
• 

  Haiku (オペレーティングシステム)

  Haiku (operating system)
  
• 

  Multics

  Multics
  
• 

  MINIX

  Minix
  
• 

  Linux Mint

  Linux Mint
  
• 

  Template:Software-stub

  Template:Software-stub
  
• 

  1by1

  
• 

  3DACE

  
• 

  3DCGツクール

  
• 

  3DXML

  3DXML
  
• 

  99Basic

  
• 

  A-0 System

  A-0 System
  
• 

  A-blog cms

  
• 

  Abaqus

  Abaqus
  
• 

  AC3D

  AC3D
  
• 

  AccuRev

  AccuRev SCM
  
• 

  Acme (テキストエディタ)

  Acme (text editor)