A built-in kernel debugger from SGI released under the GPL license. Site offers some documentation of the project and download section.

This project's purpose is to fix up kernel's unmaintained code. The content includes informations about joining the project and some tips related to browsing kernel's code.

Project to create a new configuration system for the Linux kernel build process

Documentation and development news for the memory management subsystem of the kernel.

A free source level debugger for the Linux kernel. Site includes documentation, download, details of support options, and information about the commercial 'pro' version.

A list of patches/contributions made by Richard Gooch.

Web interface that helps tracking changes in modern Linux kernel configs. Includes description of available options from the source.

Information on how to build a custom kernel.

Archive of Linux Kernel Mailing List. It has some features like viewing the latest messages and the most popular messages.

Compilation instructions. New tutorials wanted.