Companies that sell computers with GNU/Linux preinstalled
Minifree offers replacement of proprietary firmware with LibreBoot, a 100% free software BIOS, and sells laptops that bear the Respects Your Freedom certification mark. These ship preinstalled with LibreBoot and a fully free GNU/Linux distribution such as Trisquel, gNewSense or Parabola.
Los Alamos Computers (LAC) sells laptops, desktops and servers preinstalled with fully free GNU/Linux distributions, including gNewSense. In addition, they donate a portion of every sale of such systems to the FSF.
InaTux also offers computers preinstalled with gNewSense.
ThinkPenguin.com offers computers preinstalled with Trisquel.