Vertical lines with a bumpy, yet crisp, feel to it.
Source Raasa
Looks like a technical drawing board: small squares forming a nice grid.
Source We Are Pixel8
emixed from a JPG that was uploaded to Pixabay by Kyotime
Source Firkin
If you’re sick of the fancy 3D, grunge and noisy patterns, take a look at this flat 2D brick wall.
Source Listvetra
From a drawing in 'An Old Maid's Love. A Dutch tale told in English', Maarten Maartens, 1891.
Source Firkin
A hint of orange color, and some crossed and embossed lines.
Source Adam Anlauf
It’s an egg, in the form of a pattern. This really is 2012.
Source Paul Phönixweiß
Same classic 45-degree pattern, dark version.
Source Luke McDonald
More leather, and this time it’s bigger! You know, in case you need that.
Source Elemis
And some more testing, this time with Seamless Studio. It’s Robots FFS!
Source Seamless Studio
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Did some testing with Repper Pro tonight, and this gray mid-tone pattern came out.
Source Atle Mo
Prismatic Abstract Geometric Background 2 No Black
Source GDJ
The following orange background pattern resembles a honeycomb.
Source V. Hartikainen
All good things come in threes, so I give you the third in my little concrete wall series.
Source Atle Mo
Light and tiny, just the way you like it.
Source Rohit Arun Rao
Prismatic Curved Diamond Pattern 2 No Background
Source GDJ
Remixed from a drawing in 'Maidenhood; or, the Verge of the Stream', Laura Jewry, 1876.
Source Firkin
It has waves, so make sure you don’t get sea sickness.
Source CoolPatterns