Penguin on Buffalo Head

2560 × 1440

Ubuntu and Linux penguin

1440 × 900

Club Penguin crowd mosaic

1280 × 1024

Brain Illustration

1280 × 800

Neuropunk logo on black

1600 × 1000

Think Linux logo art

1400 × 1050

Think Linux logo

1280 × 854

Think Linux logo

1024 × 683

X-ray of a Skull — Black

1600 × 1200

Psycho Nauts game title screen

1024 × 768

Skull with Brain and Fetus — Black

1440 × 900

Brain with Frogs

1100 × 1034