Comparison of open-source operating systems

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These tables compare free software / open source operating systems. Where not all of the versions support a feature, the first version which supports it is listed.

Name License Kernel type Kernel programming language Kernel thread support OS family Oldest non EOL version Forks Linux Monolithic with modules C 1:1 Unix like 4.4 elks FreeBSD Monolithic with modules C 1:1 BSD, Unix like 11 DragonFly BSD OpenBSD Monolithic C 1:1 BSD, Unix like 6.4 MirOS NetBSD Monolithic with modules C 1:1 BSD, Unix like 7.0 OpenBSD DragonFly BSD Hybrid C 1:1 BSD, Unix like OpenSolaris, illumos Monolithic with modules C 1:1, M:N Unix Darwin, OpenDarwin Hybrid C, C++ 1:1 BSD, Unix, Unix like, OS X MINIX Microkernel C Unix like RedoxOS Microkernel Rust Unix like FreeRTOS RTOS C RTOS FreeDOS Monolithic C DOS 1.1 Genode Microkernel C++ 1:1 Genode Haiku Hybrid C, C++ BeOS TiltOS House Haskell own/original KolibriOS Monolithic ASM MenuetOS MenuetOS Menuet 64, commerce excluded Monolithic ASM own/original KolibriOS GNU (Hurd kernel) or Monolithic (Linux libre kernel, fork of Linux kernel, and other kernels which are not part of the GNU Project) C 1:1 Unix like 2.4 on Linux libre kernel (not on Hurd kernel) Linux ReactOS Hybrid C, C++ Windows like RISC OS Monolithic (with co operative multitaslking) ARM assembly RISC OS RISC OS 6 L4, Fiasco, Pistachio Microkernel C++ L4 Plan 9 Hybrid C 1:1, 1:M Cothread style. own, Unix informed Inferno, Plan B, 9front AROS Exokernel C AmigaOS Syllable Monolithic with modules C, C++ 1:1 Unix like, BeOS, AmigaOS, POSIX Inferno C Plan 9 OzInferno NuttX RTOS C RTOS eCos RTOS C, C++ RTOS RTEMS RTOS C and ASM with native support for other languages including C++ and Ada POSIX, RTEID/ORKID, uITRON RTOS 4.7.1 HelenOS Microkernel C M:N own/original E/OS Monolithic ASM, C 1:1 BeOS, Unix like TempleOS Monolithic HolyC, C, C++ Commodore 64 like Name License Kernel type Kernel programming language Kernel thread support OS family Oldest non EOL version Forks

Name x86, i386, IA 32 x86 SMP Xen IA 64 x86 64 PowerPC PowerPC SMP SPARC32 SPARC SMP Alpha MIPS ARM XScale M68k PA RISC OpenRISC others hosted mode Linux FR V, Cell, ETRAX CRIS, M32R, Xtensa, h8, s390, SuperH UML, coLinux, MkLinux, Itanium Linux on Linux, wombat FreeBSD PC98 OpenBSD SuperH NetBSD SuperH, ns32k, VAX, hppa, M68010, mipseb, mipsel, sh3eb, sh3el, sparc64 DragonFly BSD vkernel OpenSolaris illumos Darwin, OpenDarwin L4/Darwin MINIX FreeDOS Genode RISC V Linux Haiku KolibriOS MenuetOS GNU FR V, Cell, ETRAX CRIS, M32R, Xtensa, h8, s390, SuperH UML, Itanium Linux on Linux ReactOS RISC OS L4, Pistachio Plan 9 See lguest, vx32 AROS i386 linux, i386 freebsd Syllable Inferno AMD Am29000, Texas Instruments OMAP Microsoft Windows, Linux, FreeBSD, Plan 9, OS X, Solaris, Irix, UnixWare, HP UX, Internet Explorer FreeRTOS AVR, PIC, MSP430, HCS12, 8052, MicroBlaze, Cortex M3, H8S eCos CalmRISC, ColdFire, FR V, h8, Matsushita AM3x, Nios II, NEC V8xx, SuperH Microsoft Windows, Linux RTEMS Xen Blackfin, Nios II, Coldfire, Texas Instruments C3x/C4x, SuperH, H8S Linux, Solaris, Cygwin, FreeBSD, multiple CPU simulators HelenOS E/OS TempleOS QEMU, VirtualBox, etc. Name x86, i386, IA 32 x86 SMP Xen IA 64 x86 64 PowerPC PowerPC SMP SPARC32 SPARC SMP Alpha MIPS ARM XScale M68k PA RISC OpenRISC other hosted mode

Name ATA SATA SCSI USB 3.0 USB 2.0 USB 1.1 FireWire PCMCIA/PC card AGP Nvidia official driver IA 32 Nvidia official driver IA 64 Nvidia official driver AMD64 ATI official driver x86 ATI official driver x86 64 ATI r200 free software driver ATI r300 free software driver Nvidia free software driver Audio TV tuner, video editing, or webcam Linux 2.6.31+ ,nv(2d only), nouveau(3d with mesa) FreeBSD 8.2+ OpenBSD 5.7+ 2d only NetBSD 8.0+ DragonFly BSD OpenSolaris, illumos Darwin, OpenDarwin MINIX FreeDOS L4, Fiasco, Pistachio Plan 9 AROS own 2D only Syllable Inferno FreeRTOS eCos RTEMS HelenOS E/OS Name ATA SATA SCSI USB 3.0 USB 2.0 USB 1.1 FireWire PCMCIA/PC card AGP Nvidia official driver IA 32 Nvidia official driver IA 64 Nvidia official driver AMD64 ATI official driver x86 ATI official driver x86 64 ATI r200 free software driver ATI r300 free software driver Nvidia free software driver Audio TV tuner, video editing, or webcam