Realtime Operating System
- Growing article, with links to many related topics. Wikipedia.
- http://en.wikipedia.org/wiki/Real-time_operating_system

Enea Embedded Technology
- Develops and distributes the OSE family of real-time operating systems and embedded development tools for high reliability telecom/datacom, medical, automotive and safety critical applications.
- http://www.enea.com/

Jaluna OSware
- Virtualization platform that allows embedded products to run heterogeneous operating systems and applications.
- http://www.jaluna.com/

TurboTask RTOS
- For Z80 and Z180 compatible processors; full-featured, tiny, size ranges from 1k to 2.5k, set by features used; written in pure Assembly, making it maximally small, fast; no royalty; low cost licenses for binary and full source code. By Softools, Inc.
- http://www.softools.com/turbotask.htm

Micro Digital, Inc.
- Makes SMX: no-royalty, modular, preemptive multitasking, small fast, many featured RTOS for embedded systems. Portable to all 32-bit processors, now on ARM, ColdFire, PowerPC, SH3/4, x86. Unlike generic C kernels, it exploits strengths of x86 to make it e
- http://www.smxrtos.com/

MQX
- RTOS, no royalty, tightly integrated RTCS TCP/IP network stacks, many communication and networking protocols; suite of components, tools for embedded use, device drivers, software-development tools.
- http://www.psti.com/products/mqx/

CsLEOS
- A RTOS for high safety systems, brick-wall time, space partitioning of separate loaded programs with different levels of criticality, for greatly reduced test, certification costs, compliant to ARINC653 open system interface definition. By BAE Systems Nor
- http://platformsolutions.na.baesystems.com:8080/CsLeos/

Segger Microcontroller Systeme GmbH
- Makes, sells, supports embOS RTOS for embedded uses, multitasking, minimum cost, no royalty, fully interruptible, efficient for time critical uses, RAM and ROM needs so small it fits 1-chip uses, leaving more room for user programs.
- http://www.segger.com/embos.html

REACT
- Hard realtime extension, under 30µs interrupt response times; for Linux, and standard with SGI IRIX Unix OS; Silicon Graphics, Inc. Open source.
- http://www.sgi.com/products/software/react/

Xpolyplus
- Realtime OS and development system for programs for industrial automation, telecontrol, machine automation. It is C-Scada: does all functions of SCADA, plus control (more so with neXor I/O hardware); by XPLAB. English, Italian.
- http://www.xpolyplus.com/

Fusion RTOS
- A fast (190 cycle context switch), small (1-1.5 K), designed and optimized for next generation DSP systems; and Fusion Net (TCP/IP Stack), Fusion Web (services); all support priority based, realtime, preemptive, multitasking. By DSPOS, Inc.
- http://www.dspos.com/DSPOSWeb/rtos/fusion_RTOS.htm

Folsena Microsystems
- Makes Mavos preemptive, realtime micro (compact) OS; highly portable, is all one needs to run native and J2ME CLDC Java (VM) programs on embedded or wireless systems.
- http://folsena.com/

C Kernel
- Realtime preemptive kernel coded fully in C, so is highly portable to different hardware platforms and easily embeddable; Descriptions, full source code, examples, C Style Guide and programming Guidelines. [Free]
- http://home.hetnet.nl/~p_vd_vlugt/

SCIOPTA RTOS
- Assembly coded high performance kernels, internet protocols (TCP/IP), filesystem, support for distributed systems, DRUID system level debugger. Supports most 32-bit processors; COMPACT is for 8/16-bit controllers. By Litronic AG.
- http://www.sciopta.com/

Quadros Systems, Inc.
- Makes RTXC 3.2 and RTXC Quadros, for convergent processing in embedded uses. Seamless use with microprocessors, DSPs. Configurations: single stack, dual stack, multi stack; multicore, multiprocessing.
- http://www.quadros.com/

OS-X
- Priority-based, preemptive multitasking OS for Z80/Z180, written in TML2 and Z80 machine code; bank switched: can run processes in separate address spaces (memory banks), letting 16-bit Z80s run very many processes and host much software and data areas.
- http://home.swipnet.se/~w-68269/osx/osx.htm

TenAsys Corp.
- Makes iRMX family of RTOSs, designed and optimized for reliable, RT applications for x86 processor-based systems: PC-compatibles, and Microsoft Windows software; embedded, Multibus and Multibus II computers.
- http://www.tenasys.com/

AI Lab Zurich: Links: Embedded and Real-Time Systems
- Medium-size link page; several categories.
- http://www.ifi.unizh.ch/groups/ailab/links/embedded.html

Tics Realtime
- Simple yet powerful; small yet flexible; comprehensive yet easy to use and understand. Modern message-based architecture. Introduced June 1992, many uses: cell phones, small handheld devices, large factory automation systems, Space Shuttle.
- http://www.concentric.net/~Tics/

CMX Company
- Makes multitasking RTOS products: CMX-RTX (full RTOS), CMX-TINY+ (small RTOS), CMX-TCP/IP, CMXBug, CMXTracker. These support most 8/16/32/64-bit embedded controllers, processors, DSPs, over 30 compiler vendors.
- http://www.cmx.com/

NexGen Software
- French software house that designs and markets an Open Embedded TCP/IP suite designed for demanding embedded applications: TCP, HTTP, PPP, VoIP.
- http://www.nexgen-software.fr/

Wind River Systems, Inc.
- Makes pSOSystem, OSEKWorks, Virtuoso, VxWorks RTOSs (and BSD/OS). Merged with Integrated Systems, Inc., world leader in providing full embedded system software and design automation solutions: software, hardware, custom design, world-class support.
- http://www.windriver.com/

Pumpkin, Inc.
- Makes Salvo RTOS, designed expressly for very low cost embedded systems with highly limited ROM and RAM (normal uses: 1-2K ROM, 50-100 bytes RAM) and/or no software stack. Priority-based, cooperative multitasking, event services, real-time delays.
- http://www.pumpkininc.com/

JMI Software Systems, Inc.
- Makes C Executive and PSX multitasking, ROMable kernels for embedded systems. C Ex runs on 8/16/32 bit CISC CPUs, many RISC CPUs, DSPs, over 20 so far: fast context switch, compact. Options: DOS file system, TCP/IP, SNMP. PSX is medium-size kernel, betwee
- http://www.jmi.com/

VenturCom, Inc.
- Enabling Windows NT and Windows CE for embedded and real-time applications
- http://www.vci.com

VITA
- The VMEbus International Trade Association
- http://www.vita.com

Kadak Products Ltd.
- Makes AMX RTOS, KwikNet TCP/IP stack and Web server, KwikLook fault finder, KwikPeg GUI with graphics library. A high quality realtime software foundation for embedded products.
- http://www.kadak.com/

SW Datentechnik GmbH
- Realtime software, hardware, services: QNX, SQL, multiplatform RAD, portable UNIX-Windows, networking, RAID, multiport.
- http://www.swd.de

On Time Informatik GmbH
- Makes RTOS-32, and realtime multitasking development tools, for x86-based embedded systems; no royalty, full source code available on all products. Supports Borland, Microsoft, Watcom C/C++ compilers; DOS, Win32 compatible API gives easy ports of extant p
- http://www.on-time.com/

NewMonics, Inc.
- Leading supplier of Java-compliant virtual machines for embedded and real-time systems.
- http://www.newmonics.com/