A seamless pattern formed from a tile that can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
Remixed from a drawing in 'Line and form", Walter Crane, 1914.
Source Firkin
Paper pattern with small dust particles and 45-degree strokes.
Source Atle Mo
Prismatic Geometric Pattern Background 2
Source GDJ
A seamless pattern based on a square tile that can be retrieved in Inkscape by selecting the rectangle and using shift-alt-i.
Source Firkin
Drawn in Paint.net and vectorised in Vector Magic
Source Firkin
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
This is a grid, only it’s noisy. You know. Reminds you of those printed grids you draw on.
Source Vectorpile
The classic 45-degree diagonal line pattern, done right.
Source Jorick van Hees
Looks like an old wall. I guess that’s it then?
Source Viahorizon
From a drawing in 'Less Black than we're painted', James Payn, 1884.
Source Firkin
A seamless pattern formed from a modified version of rwwgub's tile. To get the tile, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Embossed lines and squares with subtle highlights.
Source Alex Parker
A slightly more textured pattern, medium gray. A bit like a potato sack?
Source Bilal Ketab
Hey, you never know when you’ll need a bird pattern, right?
Source Pete Fecteau
Just the symbols of the signs of the zodiac distributed in a chequer board-like pattern
Source Firkin
It’s like Shine Dotted’s sister, only rotated 45 degrees.
Source mediumidee
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Prismatic Abstract Geometric Background 5
Source GDJ
Got some felt in my mailbox today, so I scanned it for you to use.
Source Atle Mo
Background Wall, Art Abstract, Blue Well & CC0 texture.
Source Ractapopulous