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Ace Operating System Project An open source operating system for X86 architecture. It also contains documents, specifications explaining various hardware. http://www.samueldotj.com/Ace/
Agnix An open source project, which has been founded to provide an educational, network operating system kernel. http://agnix.sourceforge.net/
The Basic Kernel Source Code Secrets By William Jolitz and Lynne Jolitz (authors of 386BSD OS). Good book to learn the kernel internals of 386 architecture operating systems. http://jolitz.telemuse.net/content/books/scs_vol1/item
Cottontail OS Development Library Old non-updated mirror online library covering a plethora of OS development topics. Datasheets, tutorials, reference manuals and hardware programming information. http://www.osdever.net/cottontail/
CS 3210 Design of Operating Systems A course in operating systems with a focus on the design and construction of a modern OS kernel. http://www.cc.gatech.edu/classes/AY2000/cs3210_spring/
How to Program a Bootstrap Loader A bootstrap tutorial that includes assembly language code to demonstrate loading and executing a binary image from a FAT filesystem. http://www.omninerd.com/2005/11/05/articles/40
Intel Pentium 4 Manuals The full documentation of system management from Intel for the IA-32 architecture. http://www.intel.com/design/Pentium4/documentation.htm#manuals
KernelNewbies.org Resources for programmers new to kernel hacking. Example code, FAQs, utilities for debugging modules. http://kernelnewbies.org/
Mainframe Programming The mainframe continues to grow and transform itself while maintaining its reliability, security and speed. http://www.muraleedharan.com/mainframe_programming.html
Operating System Lecture Notes Notes on operating system theory, source code of describing actual construction of operating system in C programming language. Also OS construction related links to books, notes, tutorials, and news groups. http://www.personal.kent.edu/~rmuhamma/OpSystems/os.html
OSDev OS Development RSS News, forums, and the OSDev Wiki including the largest listing of ameatur operating system projects on the internet. http://www.osdev.org
OSDEV Community A web portal dedicated to operating system development, attracting programmers into an advanced development environment. http://www.osdcom.info/
The OSKit Project An open source set of libraries that can be used as building blocks for an operating system for x86. Includes documentation and publications. http://www.cs.utah.edu/flux/oskit/
Pierre's Library A resource center for PC operating system developers. The aim is to provide reliable documents about software and hardware standards under the aspect of official specifications as well as more friendly documents. http://pagesperso-orange.fr/pierrelib/
Porting UNIX to the 386 Historic article series appearing in 1991 that started the open source operating system movement. http://porting-unix-to-the-386.jolix.com
TAJ Operating System TAJ is an object oriented operating system written in C++. It is a multitasking, multithreading and a multiuser operating system. http://www.viralpatel.net/taj/home.php
Tuomo Kortesmaa Notes and example code for basic operating systems concepts, threads, sockets, and device drivers. http://users.evtek.fi/~tk/
visopsys OS Development A collection of source code, information, and links related to general Operating Systems Development on the Web. http://www.visopsys.org/osdev/index.html
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