The GNU Operating System is a free software movement that provides users with the freedom to run, copy, distribute, study, change and improve software.

Nonprofit promoting computer user freedom by defending rights to run, edit, share, and contribute to software.

TurnKey GNU/Linux provides 100+ free, secure, ready-to-use Debian-based system images for deploying software stacks on VMs, cloud, or bare metal.

Fiat Tux is a personal blog focused on Debian, GNU/Linux, system administration tips, and self-developed geek tools like Bignole for SSH configuration management.

Trisquel GNU/Linux is a fully free operating system for home users, small enterprises and educational centers, focusing on software freedom.

The Debian Administrator's Handbook is a free book teaching essential skills for becoming an effective and independent Debian GNU/Linux administrator.

SeaGL is a free, grassroots technical conference in Seattle focused on spreading knowledge about GNU/Linux, free/libre/open-source software, and hardware.

Blog and Web is a blogging and web development resource for beginners and experienced users.

UbuntuPIT is a technology blog providing the latest GNU/Linux news, software reviews, tutorials, and command guides for Linux enthusiasts.

Ivon's Blog shares in-depth guides on GNU/Linux, FOSS, computer/mobile tech, and philosophical discussions, focusing on practical application.

Gallery of GNU/Linux, BSD, and other open-source distributions and open source desktop environments with updates & stories on each.