Phoenix-RTOS
Growing article, with links to many related topics. Wikipedia.
Spring Operating System
Growing article, with links to many related topics. Wikipedia.
E.R.I.K.A.
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]
Real-Time Mach NTT
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. Getting Started section: readme, release notes, installation, hardware, compatibility, troubles questions and answers, and contacts.
Prex
Portable, small, realtime microkernel 32-bit OS for embedded systems, coded in C, POSIX emulation layer. Open source, BSD.
An Overview of the Spring System
Description of 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. Proceedings of Compcon.
rtmk
Realtime microkernel: preemptive, fully re-entrant, multithreaded, SMP, continuations, full locking primitives; shares many ideas with Mach, developed by CMU in late 1980's, early 1990's, stopped in 1994. [Open Source, GPL]
ERIKA Enterprise
Embedded RTOS for single and multi-core uses, small size, supports advanced scheduling mechanisms for stack size reduction on multiprocessor chip systems. Commercial. Evidence S.r.l.
Sphere SP
A modular RTOS suitable for embedded systems, scalable from tiny stand-alone microkernel up to full client/server OS, supports different processors.
Phoenix-RTOS
Goals: develop free, portable, small, well-designed RTOS for embedded hardware platforms: SBC (Single Board Computers), SOM (System on Module), SoC (System on Chip). Free.
PikeOS
Uses virtualization to protect software investment long-term; implements multiple software partitions on one CPU, strictly separated, each partition can run full OS such as Linux, POSIX, OSEK, or programs. Sysgo AG; Mainz, Germany.
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