Light square grid pattern, great for a “DIY projects” sort of website, maybe?
Source Rafael Almeida
Tiny, tiny 3D cubes. Reminds me of the good old pattern from k10k.
Source Etienne Rallion
Bigger is better, right? So here you have some large carbon fiber.
Source Factorio.us Collective
If you want png files of this u can download them here : viscious-speed.deviantart.com/gallery/27635117
Source Viscious-Speed
Prismatic Isometric Cube Extra Pattern No Background
Source GDJ
A monochrome pattern from a tile that can be had by selecting the rectangle in Inkscaope and using shift+alt+i
Source Firkin
Number 2 in a series of 5 beautiful patterns. Can be found in colors on the submitter’s website.
Source Janos Koos
Here I have tried to create something that would look like maple wood. Not sure how well it's turned out, but at least it looks like wood.
Source V. Hartikainen
Prismatic Abstract Geometric Background 4
Source GDJ
As simple and subtle as it gets. But sometimes that’s just what you want.
Source Designova
A version without colours blended together to give a different look.
Source Firkin
A free grid paper background pattern for using on web sites.
Source V. Hartikainen
If you want png files of this u can download them here : viscious-speed.deviantart.com/gallery/27635117
Source Viscious-Speed
Tiny little fibers making a soft and sweet look.
Source Badhon Ebrahim
Greyscale version of a pattern that came out of playing with the 'slinky' plug-in for Paint.net
Source Firkin
The tile this is based on can be retrieved by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
You may use it as is, or modify it as you like.
Source V. Hartikainen
Remixed from a drawing that was uploaded to Pixabay by captenpub.
Source Firkin
Bright Multicolored Floral Background by Karen Arnold from PDP.
Source GDJ
The rectangular tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
Can’t believe we don’t have this in the collection already! Slick woven pattern with crisp details.
Source Max Rudberg
Greyscale version of a pattern that came out of playing with the 'light rays' plug-in for Paint.net
Source Firkin
A seamless pattern made from the gold Penrose triangle by GDJ and the two remixes
Source Firkin
Seamless pattern formed from a tile that can be extracted by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
A textured orange background pattern with vertical stripes.
Source V. Hartikainen