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 unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
Simple combination of stripy squares with their negatively coloured counterparts
Source Firkin
Remixed from a drawing that was uploaded to Pixabay by ractapopulous
Source Firkin
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
This background pattern contains a seamless texture of bark. It's not very realistic, but I think it looks quite nice.
Source V. Hartikainen
A blue background wallpaper for websites. It has a seamless texture with vertical stripes. It looks quite nice not only when using as a tiled background on websites, but also on computer desktops.
Source V. Hartikainen
More tactile goodness. This time in the form of some rough cloth.
Source Bartosz Kaszubowski
Derived from an image that was uploaded to Pixabay by darkmoon1968
Source Firkin
Floral patterns might not be the hottest thing right now, but you never know when you need it!
Source Lauren
Remixed from a design seen in 'Burghley. The Life of William Cecil', William Charlton, 1857.
Source Firkin
An alternative colour scheme to the original seamless pattern.
Source Firkin
Dead simple but beautiful horizontal line pattern.
Source Fabian Schultz
You know you love wood patterns, so here’s one more.
Source Richard Tabor
Background Wall, Art Abstract, Block Well & CC0 texture.
Source Ractapopulous
If you want png files of this u can download them here : viscious-speed.deviantart.com/gallery/27635117
Source Viscious-Speed
A web texture of brown canvas. Will look great, when used in dark web designs.
Source V. Hartikainen
A large (588x375px) sand-colored pattern for your ever-growing collection. Shrink at will.
Source Alex Tapein
From drawing in 'Musings in Maoriland', Thomas Bracken, 1890.
Source Firkin
More in the paper realm, this time with fibers.
Source Jorge Fuentes
Just like your old suit, all striped and smooth.
Source Alex Berkowitz