Sometimes simple really is what you need, and this could fit you well.
Source Factorio.us Collective
I’m guessing this is related to the Sony Vaio? It’s a nice pattern no matter where it’s from.
Source Zigzain
You just can’t get enough of the fabric patterns, so here is one more for your collection.
Source Krisp Designs
Remixed from a drawing in 'Hungary. A guide book. By several authors', 1890.
Source Firkin
A seamless gray background texture suitable for use on websites. To me, it has the look of stone. Feel free to modify it to meet your needs (by making it a bit lighter or darker, for example).
Source V. Hartikainen
Dark and hard, just the way we like it. Embossed triangles makes a nice pattern.
Source Ivan Ginev
Bright Multicolored Floral Background by Karen Arnold from PDP.
Source GDJ
It’s a hole, in a pattern. On your website. Dig it!
Source Josh Green
A bit like smudged paint or some sort of steel, here is scribble light.
Source Tegan Male
The basic shapes never get old. Simple triangle pattern.
Source Atle Mo
Heavy depth and shadows here, but might work well on some mobile apps.
Source Damian Rivas
From a drawing in 'Handbook of the excursions proposed to be made by the Lincoln Diocesan Architectural Society, on the 27th and 28th of May, 1857', Edward Trollope, 1857.
Source Firkin
Zero CC tileable hard cover cells book texture, 4k, scanned and made by me. CC0
Source Sojan Janso
Zero CC tileable brick texture, photographed and made by me. CC0
Source Sojan Janso
Luxury pattern, looking like it came right out of Paris.
Source Daniel Beaton
Super dark, crisp and detailed. And a Kill Bill reference.
Source Badhon Ebrahim
The tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
I asked Gjermund if he could make a pattern for us – result!
Source Gjermund Gustavsen
Derived from an image that was uploaded to Pixabay by Kaz
Source Firkin
Colour version of the original pattern inspired by the front cover of 'Old and New Paris', Henry Edwards, 1894.
Source Firkin
A seamless web background with texture of aged grid paper.
Source V. Hartikainen
Semi-light fabric pattern made out of random pixels in shades of gray.
Source Atle Mo
Floral patterns will never go out of style, so enjoy this one.
Source Lasma
A good starting point for a cardboard pattern. This would work well in a variety of colors.
Source Atle Mo
A seamless pale yellow paper background with a pattern of animal tracks.
Source V. Hartikainen
A free tileable background colored in off-white (antique white) color.
Source V. Hartikainen
This is a seamless pattern which is derived from a flower petal image.
Source Yamachem