The Linux Documentation Project is an ongoing effort to provide thorough documentation of the Linux operating environment. It includes guides, FAQs, and HOWTOs.

Linux on Laptops provides advice on installing Linux on portable computers.

The Linux Kernel Archives make available for download all released versions of the Linux kernel.

JustLinux is meant to be a companion for new Linux users. It contains several different reference guides, along with discussion threads on common topics.

Focus on Macs contains guides and forums with information on switching from Windows to Macintosh.