A huge one at 800x600px. Made from a photo I took going home after work.
Source Atle Mo
A seamless pattern formed from miutopia mug remixes on a tablecloth.
Source Firkin
Medium gray pattern with small strokes to give a weave effect.
Source Catherine
Prismatic Geometric Tessellation Pattern 2 No Background
Source GDJ
A hint of orange color, and some crossed and embossed lines.
Source Adam Anlauf
A free seamless background pattern for use on websites.
Source V. Hartikainen
Remixed from a PNG that was uploaded to Pixabay by k_jprather
Source Firkin
A free seamless background image with a texture of dark red "canvas". It should look very nice on web sites.
Source V. Hartikainen
Same as gray sand but lighter. A sandy pattern with small light dots, and some angled strokes.
Source Atle Mo
From a design in 'Storia del Palazzo Vecchio in Firenze', Aurelio Gotti, 1889.
Source Firkin
Prismatic Chevrons Pattern 5 With Background
Source GDJ
This background pattern contains worn out colorful stripes as a texture.
Source V. Hartikainen
Stefan is hard at work, this time with a funky pattern of squares.
Source Stefan Aleksić
A re-make of the Gradient Squares pattern.
Source Dimitar Karaytchev
The tile this is based on can be retrieved by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
A topographic map like this has actually been requested a few times, so here you go!
Source Sam Feyaerts
Clean and crisp lines all over the place. Wrap it up with this one.
Source Dax Kieran
To get the tile this is formed from select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
If you want png files of this u can download them here : viscious-speed.deviantart.com/gallery/27635117
Source Viscious-Speed
From a drawing in 'Danmarks Riges Historie af J. Steenstrup, Kr. Erslev, A. Heise, V. Mollerup, J. A. Fridericia, E. Holm, A. D. Jørgensen', 1897.
Source Firkin