A seamless pattern formed from a sports car on clker.com. To get the tile, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
It almost looks a bit blurry, but then again, so are fishes.
Source Petr Šulc
Inspired by a drawing in 'Poems', James Smith, 1881.
Source Firkin
The Grid. A digital frontier. I tried to picture clusters of information as they traveled through the computer.
Source Haris Šumić
A light brushed aluminum pattern for your pleasure.
Source Tim Ward
Pattern formed from simple shapes. Black version.
Source Firkin
Prismatic Abstract Geometric Background 3
Source GDJ
The classic notebook paper with horizontal stripes.
Source Are Sundnes
A very dark asfalt pattern based off of a photo taken with my iPhone.
Source Atle Mo
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
Prismatic Geometric Tessellation Pattern 4 No Background
Source GDJ
A pattern derived from repeating unit cells each derived from part of a mosaic in paint.net. The starting point for the mosaic was a picture of some prawns!
Source Firkin
Dark pattern with some nice diagonal stitched lines crossing over.
Source Ashton
Wild Oliva or Oliva Wilde? Darker than the others, sort of a medium dark pattern.
Source Badhon Ebrahim
From a drawing in 'Studies for Stories', Jean Ingelow, 1864.
Source Firkin
Background formed from the iconic plastic construction bricks that gave me endless hours of fun when I was a lad.
Source Firkin
Prismatic Curved Diamond Pattern 8 No Background
Source GDJ
An aged paper background tile with smeared and pressed text.
Source V. Hartikainen
From a drawing in 'Studies for Stories', Jean Ingelow, 1864.
Source Firkin
Sometimes you just need the simplest thing.
Source Fabricio
Light gray grunge wall with a nice texture overlay.
Source Adam Anlauf
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
The image depicts polka dot seamless pattern.
Source Yamachem