The source for the Linux kernel used in Windows Subsystem for Linux 2
Hobby operating system, bootloader, kernel, drivers, C library
NVIDIA Linux open GPU kernel module source
Real-Time Embedded Frameworks based on active objects & state machines
A microkernel-based multiserver operating system written from scratch.
Casper-fs is a Custom LKM generator to protect and hide files.
The classic RPL programming language reimplemented and reimagined.
OS bootable from Linux,Windows and others partitions as auxiliary OS
UNIX/LINUX and legal homebrew software on the xbox360 gaming console
Open-source RTOS and Embedded Systems Toolkit for C++ and C
PRTOS is a simple, compact preemptive RTOS for embedded systems
ext2/3/4 library for microcontrollers
A UNIX-like kernel for the i386 architecture
Mulithreading Arduno library
Run Linux on Windows or other OSes, natively.
LinuxTLE (Revival)
Development moved to https://sourceforge.net/projects/ntfs-3g/
Android, DOS, FirefoxOS, Linux, MacOS and Windows all in one..
Small real time operating system for AVR and ARM microcontrollers
A Simple 'IDE'A for Linux Kernel Developers
Crosos is a SubLinux Distribution
C++ library for POSIX systems.