Virtual CPU with full user/supervisor and virtual memory support, fast enough to support self-emulation.

Fast C-subset compiler allowing on-the-fly compile-and-go of all applications.

Network clients & servers, remote OpenGL, GUI applications, and many other nifty features.

Runs under Windows or Linux.

See the 00README.txt for full details and a step-by-step walkthrough tutorial.
Found via https://minnie.tuhs.org/pipermail/tuhs/2017-January/009247.html

This website provides information about the creation of operating systems and serves as a community for those people interested in OS development with 673 wiki articles.

This document is a compendium of Casper Ti. Vector's thoughts about the Unix philosophy in the contemporary context.

Instead of trying to create a single, static firmware, OpenWrt provides a fully writable filesystem with package management. This frees you from the application selection and configuration provided by the vendor and allows you to customize the device through the use of packages to suit any application. For developers, OpenWrt is the framework to build an application without having to build a complete firmware around it; for users this means the ability for full customization, to use the device in ways never envisioned.

An embedded operating system designed for running multiple concurrent, mutually distrustful applications on low-memory and low-power microcontrollers.

Mailing list for fans of the incompatible timesharing system (ITS).

Rump kernels enable you to build the software stack you need without forcing you to reinvent the wheels. The key observation is that a software stack needs driver-like components which are conventionally tightly-knit into operating systems — even if you do not desire the limitations and infrastructure overhead of a given OS, you do need drivers.
Found on Kooda's blog https://www.upyum.com/en/post/2.xhtml

LNG is an operating system primarly for the good old Commodore64 home-computer. There also is a native version for the successor Commodore128. Ports to other 6502/6510 driven 8Bit Computers are possible but not yet started. LUnix started in 1993 and reached the internet in 1994. In 1997 LUnix0.1 was rewritten from scratch, the result is LNG.

Deploy and Manage Your Containers in the Next-Generation Container OS
Use immutable infrastructure to deploy and scale your containerized applications. Project Atomic mainly comprises Atomic Host, Atomic Workstation, and various container tooling. cloud native platforms.

UBports is the successor of Ubuntu touch