Clean and crisp lines all over the place. Wrap it up with this one.
Source Dax Kieran
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i
Source Firkin
Super subtle indeed, a medium gray pattern with tiny dots in a grid.
Source Designova
One more from Badhon, sharp horizontal lines making an embossed paper feeling.
Source Badhon Ebrahim
This was formed by distorting an image of a background on Pixabay.
Source Firkin
Sharp pixel pattern looking like some sort of fabric.
Source Dmitry
A seamless green background texture. The image is distributed under a Creative Commons License (like all of the images here).
Source V. Hartikainen
A free seamless background texture of "timber wall" (colored in dark brown).
Source V. Hartikainen
If you want png files of this u can download them here : viscious-speed.deviantart.com/gallery/27635117
Source Viscious-Speed
Light square grid pattern, great for a “DIY projects” sort of website, maybe?
Source Rafael Almeida
It almost looks a bit blurry, but then again, so are fishes.
Source Petr Šulc
From a drawing in 'Codogno e il suo territorio nella cronaca e nella storia'', Gio and Giarella Cairo, 1897.
Source Firkin
Drawn in Paint.net and vectorised in Vector Magic
Source Firkin
Formed by distorting a JPG from PublicDomainPictures
Source Firkin
This was formed by distorting an image of a background on Pixabay.
Source Firkin
You don’t see many mid-tone patterns here, but this one is nice.
Source Joel Klein
This one takes you back to math class. Classic mathematic board underlay.
Source Josh Green
Prismatic Triangular Background Design Mark II 5
Source GDJ
Prismatic Abstract Geometric Background 2
Source GDJ
Alternative colour scheme for the original floral pattern.
Source Firkin
Seamless Green Tile Background
Source V. Hartikainen
I took the liberty of using Dmitry’s pattern and made a version without perforation.
Source Atle Mo
Basket Fibers, Basket Texture, Braid Background style CC0 texture.
Source 1A-Photoshop
Formed from a tile based on a drawing from 'Viaggi d'un artista nell'America Meridionale', Guido Boggiani, 1895.
Source Firkin