A repeating background for websites with a texture of black groove stripes.
Source V. Hartikainen
Dark squares with some virus-looking dots in the grid.
Source Hugo Loning
Psychedelic Geometric Background No Black
Source GDJ
Green Background Pattern
Source V. Hartikainen
Not a pattern for fabrics, but one produced from a jpg of a stack of fabric items that was posted on Pixabay. The tile that this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Washi (和紙?) is a type of paper made in Japan. Here’s the pattern for you!
Source Carolynne
A playful triangle pattern with different shades of gray.
Source Dimitrie Hoekstra
Seamless Prismatic Pythagorean Line Art Pattern No Background. A seamless pattern that includes the original tile (go to Objects / Pattern / Pattern To Objects in Inkscape's menu to extract it).
Source GDJ
An alternative colour scheme for the original seamless texture formed from an image on Pixabay.
Source Firkin
The square tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
A free pink background pattern.
Source V. Hartikainen
A large (588x375px) sand-colored pattern for your ever-growing collection. Shrink at will.
Source Alex Tapein
This one takes you back to math class. Classic mathematic board underlay.
Source Josh Green
Hexagonal dark 3D pattern. What more can you ask for?
Source Norbert Levajsics
A pattern derived from repeating unit cells each derived from part of a fractal rendering in paint.net.
Source Firkin
Same as gray sand but lighter. A sandy pattern with small light dots, and some angled strokes.
Source Atle Mo
Drawn in Paint.net and vectorised in Vector Magic.
Source Firkin
Light square grid pattern, great for a “DIY projects” sort of website, maybe?
Source Rafael Almeida
This is a semi-dark pattern, sort of linen-y.
Source Sagive SEO
To get the tile this is based on, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
This was formed by distorting an image of a background on Pixabay.
Source Firkin
As simple and subtle as it gets. But sometimes that’s just what you want.
Source Designova
This background pattern contains a texture of yellow wood planks. I think it looks quite original.
Source V. Hartikainen
A car pattern?! Can it be subtle? I say yes!
Source Radosław Rzepecki