The Linux Kernel Archives

Kernel.org has 3 URLs listed in 3 Dmoz categories.

Git User's Manual
The official manual to use the version control system.
http://www.kernel.org/pub/software/scm/git/docs/user-manual.html
Top/Computers/Software/Configuration_Management/Tools/Git

The Linux Kernel Archives
This is the primary site for the Linux kernel source.
http://www.kernel.org/
Top/Computers/Software/Operating_Systems/Linux/Kernel

Linux-PAM modules
A list of the modules that people are using/developing for use with Linux-PAM.
http://www.us.kernel.org/pub/linux/libs/pam/modules.html
Top/Computers/Software/Operating_Systems/Linux/Projects/Security/PAM