The square tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
Nice and simple crossed lines in dark gray tones.
Source Stefan Aleksić
More carbon fiber for your collections. This time in white or semi-dark gray.
Source Badhon Ebrahim
Inspired by this, I came up with this pattern. Madness!
Source Atle Mo
An aged paper background tile with smeared and pressed text.
Source V. Hartikainen
Background formed from the iconic plastic construction bricks that gave me endless hours of fun when I was a lad.
Source Firkin
Derived from an image that was uploaded to Pixabay by starchim01
Source Firkin
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
From a drawing in 'Chambéry à la fin du XIVe siècle', Timoleon Chapperon, 1863.
Source Firkin
Formed from a tile based on a drawing from 'Viaggi d'un artista nell'America Meridionale', Guido Boggiani, 1895.
Source Firkin
Prismatic Groovy Concentric Background 3 No Black
Source GDJ
To get the tile this is based on, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Remixed from an image on Pixabay uploaded by Prawny
Source Firkin
This is the remix of "Tileable Wave Pattern 2" uploaded by "Arvin61r58".Thanks.I added a wire-mesh fence seamless pattern as a lower layer.
Source Yamachem
This background pattern contains a texture of yellow wood planks. I think it looks quite original.
Source V. Hartikainen
A topographic map like this has actually been requested a few times, so here you go!
Source Sam Feyaerts
Colour version of a pattern that came out of playing with the 'light rays' plug-in for Paint.net
Source Firkin
Black brick wall pattern. Brick your site up!
Source Alex Parker
Remixed from a drawing in 'The Canadian horticulturist', 1892
Source Firkin
Super detailed 16×16 tile that forms a beautiful pattern of straws.
Source Pavel
Bit of a strange name on this one, but still nice. Tiny gray square things.
Source Carlos Valdez
A seamless pattern of dark bricks. Maybe it's not very realistic, but it looks good in my opinion.
Source V. Hartikainen