A full, stand-alone RTOS: fully preemptive realtime kernel, POSIX thread library, multithread-safe standard I/O libraries, TCP/IP suite, VFAT file system, X11 R6 window system, user-level IO. By Real-Time OSs Lab, Seoul National University.

Multitasking, multiprocessor OS with features of commercial realtime OSs; as fast as VxWorks, OS-9, VRTX, LynxOS; 10 times faster in some cases: interprocessor communication. VMEbus-based, supports C/C++, goal: support developing dynamically reconfigurable software for robotic and automation systems.

Microkernel RTOSs and set of integrated tools to develop embedded realtime applications, made to support all architectures used in power train controllers in automotive industry. Kernels have 2 main layers: Kernel Layer, Hardware Abstraction Layer, HAL. [Open Source, GPL]

At the IDt (CS) Department, Mälardalen University, Sweden. Fine lists of projects, publications, and other documents. Home of Asterix Project: the real-time kernel for the final frontier.

Realtime kernel for embedded uses, follows Minimal Real-Time POSIX.13 subset. Most code is Ada, but some C, assembly. Hardware access via Abstract Hardware Interface (HAL). Runs in cross development environment: PC Linux Host, bare 386 PC Target, Ethernet LAN link. [Open Source, GPL]

Studies modeling, simulation, and design of concurrent, real-time, embedded systems. Focus: assembly of concurrent components. Key underlying principle: use of well-defined computation models that govern interaction between components.

By Real-Time and Multimedia Laboratory, Department of Computer Science, Carnegie Mellon University. RT-Mach is a resource kernel, a kernel provides resource-centric services, which can then be used to satisfy end-to-end QoS needs.

Another version of Real-Time Mach, by NTT Laboratories. Contains RT-Mach kernel, FreeBSD 2.2.8 server, real-time shell, RT-Java, Hurd loader. Site has fine 'Getting Started' section: readme, release notes, installation, hardware, compatibility, troubles Q&A, contacts.

Real-Time Systems Lab, St. Anna's School of Advanced Studies, Pisa, Italy; researches innovative algorithms, methods, tools to deal with time-dependent applications. Projects: E.R.I.K.A., HARTIK HArd Real TIme Kernel, S.Ha.R.K.

University of Pennsylvania, Philadelphia. Goal: develop methods, tools, systems to facilitate designing and implementing reliable distributed RT systems. Current projects: developing specification and analysis methods for RT systems, probabilistic modeling and analysis, schedulability analysis, run-time monitoring/checking, RT wireless communication and hybrid systems.

Hard RTOS, by University of Hannover: mature (usable in real-world systems), compact, scalable from small embedded uses to big development workstations; Motorola-based (MC, MP); uses ISO 9001-2 (software development) as internal guideline, mostly programmed via RT high-level language PEARL90, DIN 66253-2.

Dynamic configurable kernel architecture to support hard/soft/non realtime use with interchangeable scheduling algorithms: fully modular in scheduling policies, aperiodic servers, concurrency control protocols; all not modular in most traditional OSs. Derived from HARTIK: HArd Real TIme Kernel. [Open Source, GPL]

Realtime microkernel and integrated environment, designed and implemented to support/provide predictability, guarantees (on-line dynamic, atomic), end-to-end scheduling, resource reservations; supports call/task admission model; and multiprocessors.

SUpport for Multimedia in Operating systems, Lancaster University: microkernel OS with facilities to support distributed realtime and multimedia applications and ODP-based multimedia distributed application platforms.

Term paper describing development of this research realtime OS. Good discussion of needed trade-offs, compromises.

Hard realtime OS for mechatronics, newest version for PowerPC; loosely based on Oberon OS, coded in Oberon-2. Goal: create framework for non-computer-scientists needing rapid application development (RAD) tool to program embedded systems.