If you like it a bit trippy, this wave pattern might be for you.
Source Ian Soper
Drawn in Paint.net using the kaleidoscope plug-in and vectorised.
This is a blue seamless cloth texture.
Prismatic Groovy Concentric Background 3 No Black
A repeating graphic with ancient pattern. I came up with this name/title at last minute, so you may find that there is very little of ancientness in this pattern after all.
Source V. Hartikainen
A cat with a chequered them including the background.
If you want png files of this u can download them here : viscious-speed.deviantart.com/gallery/27635117
A large (588x375px) sand-colored pattern for your ever-growing collection. Shrink at will.
Source Alex Tapein
Sounds like something from World of Warcraft. Has to be good.
Source Tony Kinard
Semi-light fabric pattern made out of random pixels in shades of gray.
Source Atle Mo
Prismatic Curved Diamond Pattern No Background
From a design found in 'History of the Virginia Company of London; with letters to and from the first Colony, never before printed', Edward Neill, 1869.
Snap! A crisp pixel pattern.
Source Victor Bejar
Sharp diamond pattern. A small 24x18px tile.
Source Tom Neal
Retro Squares Background 8
Adapted heavily from a JPG that was uploaded to Pixabay by Viscious-Speed.
Gamedev - Floors Textures. CC0 License.
Source Davit Masia
Classic vertical lines, in all its subtlety.
Source Cody L
Alternative colour scheme.
From a drawing in 'At home', J. Sowerby, J. Crane and T. Frederick, 1881.
Floral patterns will never go out of style, so enjoy this one.
Dark squares with some virus-looking dots in the grid.
Source Hugo Loning
Remixed from a drawing in 'Line and form", Walter Crane, 1914.
The edges of all the red objects line up either vertically or horizontally, but it doesn't appear so. Made from a square tile that can be got by selecting the rectangle in Inkscape and using shift+alt+i.
*** Released Now !! ***10 Download
Pattern repeating background 48x48
Borderline too subtle. Yes, I said it.
CC0 and a seamless pattern from a tile drawn in Paint.net .
Prismatic Curved Diamond Pattern 5 No Background
A dark pattern made out of 3×3 circles and a 1px shadow. This works well as a carbon texture or background.
Source Atle Mo
The Grid. A digital frontier. I tried to picture clusters of information as they traveled through the computer.
Source Haris Šumić