List of real-time operating systems Informatics Engineering 464 pasar.pts-ptn.net

This is a list of real-time operating systems. An RTOS is an operating system in which the maximum time from an input stimulus to an output response can be definitely determined.

Name	License	Source model	Target usage	Status	Platforms	Official site
Abassi	proprietary	closed	embedded	active	AVR32, ATmega, Coldfire, Cortex-A9, Cortex-M0, Cortex-M3, Cortex-M4, MSP430, PIC32, TMS320C2000, 80251, 8051	[1]
AMOS	Proprietary	?	commercial	closed	680x0, 683xx, x86 via emulation	[2]
AMX RTOS	?	?	embedded	?	680x0, 683xx, ARM, ColdFire, MIPS32, PowerPC	[3]
ARTOS (Locamation)	proprietary	?	embedded	active	x86	[4]
ARTOS (Robotu)	proprietary	?	embedded	active	ARM9+	[5]
Atomthreads	BSD	open source	embedded	active	AVR, STM8	[6]
AVIX	proprietary	closed	embedded	active	Atmel AT91SAM3(U/S), Energy Micro EFM32, NXP LPC1300, LPC1700, ST Micro STM32, Texas Instruments LM3S, Toshiba TMPM330, Microchip PIC32MX, Microchip PIC24F, PIC24H, dsPIC30F & dsPIC33F	[7]
BeRTOS	modified GNU GPL	open source	embedded	active	DSP56K, I196, IA32, ARM, AVR	[8]
BRTOS	MIT License	open source	embedded	active	Freescale Coldfire V1, Freescale HCS08, Texas Instruments MSP430 and Atmel ATMEGA328/128 (Port for PIC18 in development	[9]
CapROS	GNU GPL	open source	embedded	active	IA32, ARM9	[10]
ChibiOS/RT	Modified GNU GPL or proprietary	open source	embedded, small footprint	active	x86, ARM7, ARM9, Cortex-M0, Cortex-M3, Cortex-M4, PowerPC e200z, STM8, AVR, MSP430, Coldfire, H8S	[11] [12]
ChorusOS	?	?	?	?	SPARC, x86, PowerPC	[13]
ChronOS	GNU GPL	open source	research, general purpose	active	x86, ARM	[14]
CMX RTOS	proprietary	?	embedded	active	IA32, ARM, AVR, H8, PIC, 8051	[15]
CoActionOS	Modified GNU GPL or proprietary	open source	embedded	active	ARM Cortex-M3, LPC17xx	[16]
cocoOS	BSD	open source	embedded	active	AVR, MSP430	[17]
Concurrent CP/M	proprietary	closed (meanwhile: open source)	general purpose	defunct	8080, Z80, 8086	Digital Research
Concurrent DOS	proprietary	closed	general purpose	defunct	8086, 286, 386, 68000, (also 8080/Z80 in dual-processor variants)	Digital Research
Contiki	BSD	open source	embedded	active	MSP430, AVR	[18]
COS	proprietary	closed	process control	defunct	GEC 4000 series	?
CooCox CoOS	BSD	open source	general purpose	active	STM32, NXP LPC1000, TI LM3S8962,Nuvoton NU1xx,Holtek HT32	[19]
Deos	proprietary	closed	safety critical	active	x86, PowerPC, PowerQUICC	[20]
DioneOS	proprietary	available for licensee	embedded	active	Texas Instruments MSP430, MSP430x	[21]
DNIX	proprietary	closed	general purpose	defunct	68000	?
GEC DOS	proprietary	closed	process control	defunct	GEC 4000 series	?
DrRtos	free?	open?	?	active?	ARM7	[22]
DSOS	?	?	?	defunct	TI-980A minicomputer	?
DSP/BIOS	free	closed, available with license	general purpose	active	Primarily Texas Instruments C2800, C5500, C6000 and OMAP DSP cores	[23]
DSPnano RTOS	Open Source and Commercial	Open Source	MCU, DSC, DSP SoC	active	R8C, M16C, PIC24, dsPIC33	[24]
eCos	modified GNU GPL	open source	general purpose	active	ARM/XScale/Cortex-M, CalmRISC, 68000/Coldfire, fr30, FR-V, H8, IA32, MIPS, MN10300, OpenRISC, PowerPC, SPARC, SuperH, V8xx	[25]
eCosPro	modified GNU GPL and eCosPro license	open source with non-free portions	general purpose	active	ARM/XScale/Cortex-M, CalmRISC, 68000/Coldfire, fr30, FR-V, H8, IA32, MIPS, MN10300, NIOS2, OpenRISC, PowerPC, SPARC, SuperH, V8xx	[26]
embOS	proprietary	closed	embedded	active	8/16/32 bit processors	[27]
Embox	BSD License	open source	embedded	active	ARM, LEON, MicroBlaze, x86	[28]
ERIKA Enterprise	GPL+Linking exception	Open Source	embedded	active	ARM7, ARM Cortex MX, Hitachi H8, Altera Nios2, Microchip dsPIC (including dsPIC30, dsPIC33, and PIC24), Microchip PIC32, ST Microelectronics ST10, Infineon C167, Infineon Tricore, Freescale PPC e200 (MPC 56xx) (including PPC e200 z0, z6, z7), Freescale S12XS, EnSilica eSi-RISC, Atmel AVR5, Lattice Mico32, TI MSP430, Renesas RX200	[29]
EROS	GPL	open source	experimental research use	dormant	IA32	[30]
Femto OS	GPLv3	open source	embedded	active	AVR	[31]
FlexOS	proprietary	closed	general purpose	defunct	186, 286, 386, V60, V70, 68000	Digital Research/Novell
FreeOSEK	GPLv3	open source	embedded	active	Posix, Windows, ARM7	[32]
FreeRTOS	modified GNU GPL	open source	embedded	active	ARM, AVR, AVR32, Freescale ColdFire, HCS12, IA32, Cortex-M3, MicroBlaze, MSP430, PIC, PIC32, Renesas H8/S, 8052, STM32	[33]
FunkOS	modified Sleepycat license	open source	embedded	active	AVR, MSP430, Cortex-M3	[34]
Fusion RTOS	free	?	semi-general purpose	active	ARM, Blackfin, StarCore, DSP 56800E
HeartOS	proprietary	closed	safety critical	active	x86, PowerPC, PowerQUICC	[35]
Helium	free	?	?	?	Open-Source RTOS for HCS08 & AVR MCUs	[36]
HP-1000/RTE	?	?	?	?	?	[37]
Hybridthreads	?	open source	FPGA	active	Xilinx Virtex-II Pro ML310, Xilinx Virtex-II Pro XUP	[38]
IBM 4680 OS	proprietary	closed	general purpose	defunct	286	IBM (DR Concurrent DOS 286 derivative)
IBM 4690 OS	proprietary	closed	general purpose	active	286, 386	IBM (DR FlexOS 286/386 derivative)
INTEGRITY	proprietary	closed	embedded	active	ARM, XScale, Blackfin, Freescale ColdFire, MIPS, PowerPC, x86	[39]
IntervalZero RTX	proprietary	closed	MS Windows extension	active	x86	[40]
ITRON, µITRON	varies	varies	embedded	active	ARM, MIPS, x86, and others	[41], [42]
ioRTOS	proprietary	closed	embedded, safety critical	active	TI TMS320 Families (x2812, c6416)	[43]
iRTOS	GNU LGPL	open source	embedded	active	AVR, ARM7	[44]
KolibriOS	GNU GPL	open source	embeddable	active	x86	[45]
LynxOS	proprietary	source code available	embedded	active	Motorola 68010, x86/IA-32, ARM, Freescale PowerPC, PowerPC 970, LEON3	[46]
MaRTE OS	GNU GPL	open source	embedded	active	IA-32	[47]
MAX II,IV	proprietary	?	?	?	Modcomp II,IV,...	?
MenuetOS	?	?	?	?	?	[48]
Micrium µC/OS-II	proprietary	Available under license	embedded	active	ARM7/9/11/Cortex M1/3, AVR, HC11/12/S12, Coldfire, Blackfin, Microblaze, NIOS, 8051, x86, Win32, H8S, M16C, M32C, MIPS, 68000, PIC24/dsPIC33/PIC32, MSP430, PowerPC, SH, StarCore, STM32, …	[49]
Micrium µC/OS-III	proprietary	Available under license	embedded	active	ARM7/9/11/Cortex M1/3, AVR, HC11/12/S12, Coldfire, Blackfin, Microblaze, NIOS, 8051, x86, Win32, H8S, M16C, M32C, MIPS, 68000, PIC24/dsPIC33/PIC32, MSP430, PowerPC, SH, StarCore, STM32, …	[50]
Milos	GNU GPL	open source	embedded	active	Cortex-M3	[51]
Microsoft Invisible Computing (MMLite)	proprietary	open source	embedded	active	Arm7, Arm9, i386, h8, mips, Trimedia, eCog1	[52]
MP/M	proprietary	closed (meanwhile: open source)	general purpose	defunct	8080, Z80, 8086	Digital Research
MQX	proprietary	complimentary source code available	embedded	active	Freescale Power, ColdFire, Kinetis Cortex ARM, List of Freescale products,	[53]
MERT	?	?	?	inactive	PDP-11	?
Multiuser DOS	proprietary	closed	general-purpose	defunct	386	Digital Research/Novell, Concurrent Controls/Datapac/IMS (see REAL/32)
Nano-RK	mixed	open source	embedded	active	AVR, MSP430	[54]
Neutrino	proprietary	some source code provided	microkernel	active	ARM, MIPS, PPC, SH, x86, XScale	[55]
Nokia OS	?	?	embedded GSM devices	?	ARM	(Epoc32)?
Nucleus OS	proprietary	source code provided	embedded	active	ARM (Cortex-M3, M4, R4, R4F, A8, A9, ARM7, ARM9, ARM11), PowerPC, MIPS32, MIPS16e, microMIPS, Coldfire, SuperH	[56]
NuttX	BSD	open source	embedded, small footprint	active	Linux user mode, ARM7, ARM9, Cortex-M3, 8052, SH-1, Renesas MC16C/26, Zilog Z16F, Zilog eZ80 Acclaim!, Zilog Z8Encore!, Z80, partial ports for MIPS	[57]
On Time RTOS-32	proprietary	source code available	embedded	active	32/64-bit x86	[58]
OS20	proprietary	closed	embedded (STB)	maintenance only	ST20	?
OS21	proprietary	source code provided	embedded (STB)	active	ST40/SH4,ST200,ARM	?
OS4000	proprietary	closed	process control	maintenance only	GEC 4000 series	?
OPENRTOS	proprietary	source code available	embedded	active	Same as FreeRTOS	[59]
OSA	BSD	open source	embedded	active	PIC10-PIC24, AVR 8bit, STM8	[60]
OSE	proprietary	closed	general purpose	active	ARM, PowerPC, MIPS, IXP2400, TI OMAP, …	[61]
OS-9	proprietary	available to customers	embedded	active	ARM/strongARM, MIPS, PowerPC, SuperH, x86/Pentium, XSCALE, Motorola 6809, Motorola 68000-series	[62]
OSEK	n/a	specification	embedded	active	engine control units	[63]
Phar Lap ETS	?	?	?	?	?	?
PaulOS	GNU GPL	open source	embedded	?	?	[64]
PICOS18	GNU GPL	open source	embedded	?	PIC18	[65]
picoOS	Modified BSD License	open source	embedded	discontinued	6502, 80x86, ARM7, AVR, PowerPC	[66]
Phoenix-RTOS	GNU GPL	open source	embedded	?	ARM7, X86, PowerPC	[67]
PikeOS	proprietary	available to customers	safety critical, virtualization	active	PPC, x86, ARM, MIPS, SPARC/Leon, SuperH	[68]
Portos	proprietary	source code provided	embedded, small footprint	active	DSP/BIOS (ARM soon)	[69]
POK	BSD	open source	embedded	active	x86, PowerPC, SPARC	[70]
PowerTV	proprietary	?	?	?	?	[71]
Prex	BSD	open source	microkernel	active	ARM, IA32	[72]
Protothreads	BSD	open source	general purpose	active	Architecture independent	[73]
pSOS	proprietary	?	?	discontinued	Motorola 680x, Motorola 68000	?
QNX	mixed	?	general purpose	active	IA32, MIPS, PowerPC, SH-4, ARM, StrongARM, XScale	[74]
Q-Kernel	proprietary	available to customers	embedded	active	PIC-30, PIC-24, dsPIC, PIC32MX	[75]
QP	Open Source and Commercial	Open Source	MCU, DSC, DSP SoC	active	ARM7/9, ARM Cortex-M3/Cortex-M0, MSP430, TMS320C28x, AVR, AVRXmega, ColdFire, 68HC08, M16C/R8C, H8, 8051, 80251, PIC18, PIC24/dsPIC33, Nios II, PSoC1	[76]
RDOS	proprietary	?	general purpose	defunct	Data General Nova, Data General Eclipse	n/a
ReaGOS	proprietary	closed, available with license	embedded	active	x86, ATmega, ARM, portable	[77]
REAL/32	proprietary	closed	general-purpose	active	386	IMS (Multiuser DOS derivative)
Real-time Linux (CONFIG_RT_PREEMPT)	GPLv2	open source	general purpose	active	same as Linux	[78] wiki
REX OS	proprietary	closed, available with license	embedded	inactive	ARM	ja:REX OS
RMX	?	?	?	active	8080, 8086, 80386 or higher	[79]
RSX-11	proprietary	?	?	historic	PDP-11	n/a
RT-11	proprietary	?	general purpose	defunct	PDP-11	n/a
RTAI	GNU GPL	open source	general purpose	active	x86, ARM	[80]
RTEMS	modified GNU GPL	open source	embedded	active	ARM, Blackfin, ColdFire, TI C3x/C4x, H8/300, x86, 68k, Milkymist SoC, MIPS, Nios II, PowerPC, SuperH, SPARC, ERC32, LEON, Mongoose-V	[81]
rt-kernel	mixed	available to customers	embedded	active	ARM7, ARM9, Cortex-M3, Cortex-A8, Blackfin, PowerPC, Windows (simulation)	[82]
RTLinux	GNU GPL	open source	general purpose	inactive	same as Linux	[83]
RT-Thread	GPLv2	open source	embedded	active	ARM, IA-32, AVR32,M16C, MIPS	[84][85]
RTXC Quadros	proprietary	source available	embedded	active	[[ARM architecture\|ARM - Atmel/Freescale/NXP/ST/TI]], Blackfin, Coldfire/68K, PowerPC, StarCore, TI/Luminary Stellaris, TI OMAP, XScale	[86]
SafeRTOS	proprietary	source code & Design Assurance Pack available	embedded, Safety Critical	active	Same as FreeRTOS	[87]
Salvo	proprietary	source available	embedded	active	8051, ARM ARM7TDMI and Cortex-M3, Atmel AVR and Mega AVR, Epson S1C17, Motorola M68HC11, TI MSP430, PICmicro 12/14000/16/17/18, PIC24, dsPIC, PIC32, TMS320C2000	[88]
SCIOPTA	proprietary	closed, source available	embedded, safety related	active	ARM, Cortex-M0, Cortex-M3, Cortex-M4, Cortex-R4, Cortex-A9, XScale, Renesas RX, PowerPC, ColdFire, HCS12, M16C, Windows(simulation)	[89]
scmRTOS	free	open source	embedded	active	ARM, Cortex-M3, Blackfin, MSP430, AVR	[90]
SDPOS	GNU LGPL	open source	embedded	active	ARM, Cortex-M3, Blackfin, PIC18, PIC24, i386 win32/linux synthetic targets	[91]
SHaRK	GNU GPL	open source	?	?	?	[92]
silRTOS	free	open source	embedded	active	ARM, Cortex-M3 Cortex-A9 ARM-11MP, Blackfin, MIPS, AVR	[93]
SimpleAVROS	GPLv3	open source	embedded	active, beta	AVR only	n/a
SINTRAN III	?	?	?	?	Norsk Data computers	n/a
Sirius RTOS	proprietary	available under license	embedded	active	x86, i386+, ARM, 68k, 8051, ...	[94]
SMX RTOS	proprietary	available under license	embedded	active	ARM, Cortex, ColdFire, PowerPC, x86, ...	[95]
SOOS Project	free	open source	embedded	active, beta	H8/300	[96]
SYS/BIOS (previously SPOX, BIOSuite, DSP/BIOS)	proprietary	closed	embedded	inactive	Texas Instruments: C3x, C4x, C5x and C8x families	[97]
Symbian OS	Eclipse Public License	open source	embedded	active	ARM	[98]
SYS/BIOS	BSD License	open source	embedded	active	Primarily Texas Instruments: MSP430, C2000, C5000, C6000 and their ARM families (Cortex M3/4F, Cortex R4, Cortex A8, Cortex A15)	[99]
Talon DSP RTOS	proprietary	?	embedded DSP	active	TMS320	[100]
TargetOS	proprietary	available to customers	embedded	?	ARM, Freescale ColdFire, Freescale PowerPC	[101]
T-Kernel	free under T-License	source available	embedded RTOS	active	ARM/MIPS/SH/others	[102]
THEOS	?	?	?	?	?	[103]
ThreadX	proprietary	available to customers	?	active	ARC, ARM/Thumb, AVR32, BlackFin, ColdFire/68K, H8/300H, Luminary Micro Stellaris, M-CORE, MicroBlaze, PIC24/dsPIC, PIC32, MIPS, V8xx, Nios II, PowerPC, SH, SHARC, StarCore, STM32, StrongARM, TMS320C54x, TMS320C6x, x86/x386, XScale, Xtensa/Diamond, ZSP	[104]
Trampoline Operating System (OSEK and AUTOSAR)	GNU LGPL	open source	embedded	active	AVR, H8/300H, POSIX, NEC V850e, ARM7, Infineon C166, HCS12 or PowerPC	[105]
TNKernel	BSD	open source	embedded	active	ARM, PIC24/dsPIC, PIC32, HCS08, STM32 (Cortex-M3)	[106]
Transaction Processing Facility	proprietary	?	general purpose	active	IBM System/360 derivatives	[107]
TRON project	open?	mixed	mixed	active	any: not an implementation, but a specification	[108]
TUD:OS	GNU GPL	open source	?	active	ARM, IA-32, X86-64	[109]
Unison RTOS	Open Source and Commercial	Open Source	MCU, DSC, DSP SoC	active	Pic32, ARM Cortex (TI Stellaris, ST STM32, NXP LPC1700), SH2A, SH2AFPU, R32C, MIPS4K, {SHARC, Coldfire, TMS320, Altera NIOS, Xilinx Microblaze, Proprietary}	[110]
UNIX-RTR	?	?	?	?	PDP-11	?
uSmartx	?	open source	embedded	?	ARM7TDMI, AVR, H8	[111]
µTasker	proprietary	Open-code. Free for non-commercial or with support license	embedded	active	Freescale Kinetis, Freescale Coldfire M522XX, Atmel AVR32, Atmel SAM7X, TI Stellaris, NXP LPC2000, NXP LPC1700, ST-Micro STM32 (F1/F2/F4), ST-Micro STR91X, Freescale NE64, Windows (processor and peripheral simulation)	[112]
u-velOSity	?	?	microkernel	active	?	[113]
velOSity	?	?	?	active	Power Architecture, ARM/XScale, MIPS, x86/Pentium, ColdFire, Blackfin, OMAP, DaVinci	[114]
VRTX	?	?	?	inactive	ARM, MIPS, PowerPC, RISC	[115]
VxWorks	proprietary	?	embedded	active	ARM, IA32, Intel 64, MIPS, PowerPC, SH-4, StrongARM, xScale	[116]
Windows CE	proprietary	Microsoft Shared Source	embedded	active	x86, MIPS, ARM, SuperH	[117]
Xenomai	GPLv2	Open Source	general	active	x86, x86_64, PowerPC, ARM, Analog Devices Blackfin BF52x, BF53x, BF54x and BF56x	[118]
xPC Target	proprietary	closed	real-time testing/embedded	active	x86	[119]
Y@SOS	GNU LGPL	Open Source	embedded	active	Cortex-M3, STM32	[120]
MontaVista Linux	GNU GPL	Open Source	embedded	active	?	[121]
µnOS	?	?	?	historic	Motorola 68k	?
uOS	GNU GPL	Open Source	embedded	active	AVR, ARM, MIPS32, MSP430, Intel i386, Linux386	[122]

Real-time operating systems (RTOS)

List of real-time operating systems

BeRTOS ChibiOS/RT Contiki DioneOS DNIX DSOS eCos Embedded Linux ERIKA Enterprise EROS FreeRTOS FunkOS Integrity Junos KolibriOS LynxOS MenuetOS MQX MERT Nano-RK Nucleus RTOS OpenComRTOS OS-9 OSE PikeOS pSOS Prex QNX REX OS RMX RSX-11 RT-11 RTEMS RTLinux RT-Thread Sintran III Symbian SYS/BIOS Talon DSP RTOS THEOS ThreadX TPF TRON µC/OS-II VRTX VxWorks Windows CE Wombat OS