Looks like a technical drawing board: small squares forming a nice grid.
Source We Are Pixel8
A pattern drawn in Paint.net and vectorized in Vector Magic.
Source Firkin
A version without colours blended together to give a different look.
Source Firkin
Could be paper, could be a Polaroid frame – up to you!
Source Chaos
You were craving more leather, so I whipped this up by scanning a leather jacket.
Source Atle Mo
White fabric looking texture with some nice random wave features.
Source Hendrik Lammers
From a drawing in 'Codogno e il suo territorio nella cronaca e nella storia'', Gio and Giarella Cairo, 1897.
Source Firkin
Prismatic Groovy Concentric Background 3 No Black
Source GDJ
An abstract Background pattern of purple twisty patterns.
Source TikiGiki
A background pattern inspired by designs seen in 'Burghley. The Life of William Cecil', William Charlton, 1857.
Source Firkin
Number 5 in a series of 5 beautiful patterns. Can be found in colors on the submitter’s website.
Source Janos Koos
A beautiful dark padded pattern, like an old classic sofa.
Source Chris Baldie
A subtle shadowed checkered pattern. Increase the lightness for even more subtle sexiness.
Source Josh Green
It looks very nice I think.
Source V. Hartikainen
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
Zero CC tileable moss or lichen covered stone texture, edited from pixabay. CC0
Source Sojan Janso
Prismatic Groovy Concentric Background 5
Source GDJ
Seamless pattern formed from a tile that can be extracted by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
White fabric looking texture with some nice random wave features.
Source Hendrik Lammers
Some rectangles, a bit of dust and grunge, plus a hint of concrete.
Source Atle Mo
Remixed from a drawing in 'Works. Popular edition', John Ruskin, 1886.
Source Firkin
Your eyes can trip a bit from looking at this – use it wisely.
Source Michal Chovanec
From a drawing in 'Resa i Afrika, genom Angola, Ovampo och Damaraland', P. Moller, 1899.
Source Firkin
Here is a new seamless wood texture for using as blog or website backgrounds.
Source V. Hartikainen
Medium gray pattern with small strokes to give a weave effect.
Source Catherine
Real snow that tiles, not easy. This is not perfect, but an attempt.
Source Atle Mo