Same classic 45-degree pattern, dark version.
Source Luke McDonald
A frame using leaves from an image that was uploaded to Pixabay by mayapujiati
Source Firkin
Seamless Prismatic Pythagorean Line Art Pattern No Background. A seamless pattern that includes the original tile (go to Objects / Pattern / Pattern To Objects in Inkscape's menu to extract it).
Source GDJ
A bit strange this one, but nice at the same time.
Source Diogo Silva
Horizontal and vertical lines on a light gray background.
Source Adam Anlauf
Black And White Floral Pattern Background from PDP.
Source GDJ
Psychedelic Geometric Background No Black
Source GDJ
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Remixed from a drawing in 'Line and form", Walter Crane, 1914.
Source Firkin
Remixed from a drawing in 'A Girl in Ten Thousand', Elizabeth Meade, 1896.
Source Firkin
A seamless pattern formed from cross 4. To get the original tile select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
A repeatable image with dark background and metal grid pattern.
Source V. Hartikainen
The image depicts polka dot seamless pattern.
Source Yamachem
Nicely executed tiling for an interesting pattern.
Source Ignasi Àvila Padró
Prismatic Basic Pattern 2 No Background
Source GDJ
A subtle shadowed checkered pattern. Increase the lightness for even more subtle sexiness.
Source Josh Green
This reminds me of Game Cube. A nice light 3D cube pattern.
Source Sander Ottens
A brown seamless wood texture in a form of stripe pattern. The result has turned out pretty well, in my opinion.
Source V. Hartikainen
A nice and simple gray stucco material. Great on its own, or as a base for a new pattern.
Source Bartosz Kaszubowski
From a drawing in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.
Source Firkin
Abstract Tiled Background Extended 10
Source GDJ
A slightly more textured pattern, medium gray. A bit like a potato sack?
Source Bilal Ketab
A seamless web background with texture of aged grid paper.
Source V. Hartikainen
Adapted heavily from a JPG that was uploaded to Pixabay by Viscious-Speed.
Source Firkin
There are many carbon patterns, but this one is tiny.
Source Designova