Horizontal and vertical lines on a light gray background.
Source Adam Anlauf
Simple combination of stripy squares with their negatively coloured counterparts
Source Firkin
On a large canvas you can see it tiling, but used on smaller areas, it’s beautiful.
Source Paul Phönixweiß
From a drawing in 'Picturesque New Guinea', J Lindt, 1887.
Source Firkin
f you want png files of this u can download them here : viscious-speed.deviantart.com/gallery/27635117
Source Viscious-Speed
A very slick dark rubber grip pattern, sort of like the grip on a camera.
Source Sinisha
Background Wall, Art Abstract, white Well & CC0 texture.
Source Ractapopulous
Dark, lines, noise, tactile. You get the drift.
Source Anatoli Nicolae
Prismatic Curved Diamond Pattern 4 No Background
Source GDJ
This one is so simple, yet so good. And you know it. Has to be in the collection.
Source Gluszczenko
From a drawing in 'Chambéry à la fin du XIVe siècle', Timoleon Chapperon, 1863.
Source Firkin
Love the style on this one, very fresh. Diagonal diamond pattern. Get it?
Source INS
A seamless pattern of "sewn stripes" colored in light gray.
Source V. Hartikainen
A dark one with geometric shapes and dotted lines.
Source Mohawk Studios
This one takes you back to math class. Classic mathematic board underlay.
Source Josh Green
Prismatic Hexagonalism Pattern No Background
Source GDJ
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
A seamless pattern formed from a tile made from page ornament 22. To get the tile, select the rectangle in Inkscape and use shift+alt+i.
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
Simple combination of stripy squares with their negatively coloured counterparts
Source Firkin
Some rectangles, a bit of dust and grunge, plus a hint of concrete.
Source Atle Mo
This tiled background comes in red and consists of tiles that look like gemstones. It is more for blogs or social profiles, I think.
Source V. Hartikainen
Made by distorting a simple pattern using the 'sin waves' plugin for Paint.net and vectorising in Vector Magic
Source Firkin
Prismatic Hypnotic Pattern No Background
Source GDJ