A seamless pattern formed from a square tile. To get the tile, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Drawn in Paint.net and vectorised in Vector Magic
Source Firkin
The image depicts polka dot seamless pattern.
Source Yamachem
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Some dark 45 degree angles creating a nice pattern. Huge.
Source Dark Sharp Edges
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
There are many carbon patterns, but this one is tiny.
Source Designova
As simple and subtle as it gets. But sometimes that’s just what you want.
Source Designova
Just what the name says, paper fibers. Always good to have.
Source Heliodor jalba
Prismatic Hypnotic Pattern No Background
Source GDJ
The act or state of corrugating or of being corrugated, a wrinkle; fold; furrow; ridge.
Source Anna Litvinuk
More carbon fiber for your collections. This time in white or semi-dark gray.
Source Badhon Ebrahim
Green Web Background, Seamless tile.
Source V. Hartikainen
Sort of like the Photoshop transparent background, but better!
Source Alex Parker
Colorful Floral Background 3 No Black
Source GDJ
Clean and crisp lines all over the place. Wrap it up with this one.
Source Dax Kieran
Zero CC tileable brick texture, photographed and made by me. CC0
Source Sojan Janso
Derived from a drawing in 'At home', J. Sowerby, J. Crane and T. Frederick, 1881.
Source Firkin