This one is super crisp at 2X. Lined paper with some dust and scratches.
Source HQvectors
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
A version without colours blended together to give a different look.
Source Firkin
Abstract Tiled Background Extended 10
Source GDJ
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
Same classic 45-degree pattern, dark version.
Source Luke McDonald
Clean and crisp lines all over the place. Wrap it up with this one.
Source Dax Kieran
Bigger is better, right? So here you have some large carbon fiber.
Source Factorio.us Collective
Dark squares with some virus-looking dots in the grid.
Source Hugo Loning
A seamless dark leather-like background texture with diagonal lines that look like stitches.
Source V. Hartikainen
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
A seamless pattern formed from a tile that can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
Can never have too many knitting patterns, especially as nice as this.
Source Victoria Spahn
Looks a bit like concrete with subtle specks spread around the pattern.
Source Mladjan Antic
Just what the name says, paper fibers. Always good to have.
Source Heliodor jalba
Love the style on this one, very fresh. Diagonal diamond pattern. Get it?
Source INS
This was formed by distorting an image of a background on Pixabay.
Source Firkin
Made by distorting a simple pattern using the 'sin waves' plugin for Paint.net and vectorising in Vector Magic
Source Firkin