Same classic 45-degree pattern, dark version.
Source Luke McDonald
Inspired by a pattern I saw in a 19th century book. This seamless pattern was created from a square tile. To get the tile, select the pattern in Inkscape and use shift+alt+i.
Source Firkin
The classic 45-degree diagonal line pattern, done right.
Source Jorick van Hees
A free seamless background image with a texture of dark red "canvas". It should look very nice on web sites.
Source V. Hartikainen
Prismatic Abstract Geometric Background derived from an image on Pixabay.
Source GDJ
We have some linen patterns here, but none that are stressed. Until now.
Source Jordan Pittman
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
Number 5 in a series of 5 beautiful patterns. Can be found in colors on the submitter’s website.
Source Janos Koos
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
It’s like Shine Dotted’s sister, only rotated 45 degrees.
Source mediumidee
Drawn in Paint.net and vectorised in Vector Magic.
Source Firkin
A seamless background texture of old cardboard.
Source V. Hartikainen