Derived from an image that was uploaded to Pixabay by Kaz
Source Firkin
A dark brown fabric-like background texture with seamless pattern of winding stripes.
Source V. Hartikainen
Very dark pattern with some noise and 45-degree lines.
Source Stefan Aleksić
Remixed from a drawing in 'Maidenhood; or, the Verge of the Stream', Laura Jewry, 1876.
Source Firkin
Colour version that is close to the original drawing uploaded to Pixabay by pencilparker.
Source Firkin
Lovely pattern with splattered vintage speckles.
Source David Pomfret
Remixed from a drawing in 'An Index to Deering's Nottinghamia Vetus et Nova', Rupert Chicken, 1899. The unit tile can be had by selecting the rectangle in Inkscape and using shift-alt-i
Source Firkin
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
A seamless background drawn in Paint.net and vectorised with Vector Magic. The starting point was a photograph of drinking straws from Pixabay.
Source Firkin
Same classic 45-degree pattern, dark version.
Source Luke McDonald
Light square grid pattern, great for a “DIY projects” sort of website, maybe?
Source Rafael Almeida
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
A beautiful dark wood pattern, superbly tiled.
Source Omar Alvarado
Lovely light gray floral motif with some subtle shades.
Source GraphicsWall
Could remind you a bit of those squares in Super Mario Bros, yeh?
Source Jeff Wall
It’s okay to be square! A nice light gray pattern with random squares.
Source Waseem Dahman
The tile this fill pattern is based on can be had by using shift+alt+i on the rectangle.
Source Firkin
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight