Similar to OpenSolaris
Arch Hurd
Arch HurdBerkeley Software Distribution
Berkeley Software DistributionGNU
GNUGNU Hurd
GNU HurdPlan 9 from Bell Labs
Plan 9 from Bell LabsRedox (オペレーティングシステム)
Redox (operating system)Syllable
Syllable DesktopVersion 6 Unix
Version 6 UnixVersion 7 Unix
Version 7 UnixXv6
Xv6MINIX
MinixNexenta OS
Nexenta OSIPhone OS 2
IPhone OS 2386BSD
386BSDApache Mynewt
Apache MynewtAROS Research Operating System
AROS Research Operating SystemAtheOS
AtheOSChibiOS/RT
ChibiOS/RTCollapse OS
Contiki
ContikiCP/M
CP/MCP/M-68K
CP/M-8000
CP/M-86
CP/M-86ECos
ECosEmuTOS
EmuTOSEyeOS
EyeOSFreeDOS
FreeDOS