Drawn in Paint.net and vectorised in Vector Magic.
Source Firkin
White circles connecting on a light gray background.
Source Mark Collins
ZeroCC tileable stone texture, edited from pixabay. CC0
Source Sojan Janso
Abstract Arbitrary Geometric Background derived from an image on Pixabay.
Source GDJ
This one is super crisp at 2X. Lined paper with some dust and scratches.
Source HQvectors
A seamless pattern formed from a tile made from page ornament 22. To get the tile, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
This one is amazing, truly original. Go use it!
Source Viahorizon
If you want png files of this u can download them here : viscious-speed.deviantart.com/gallery/27635117
Source Viscious-Speed
I took the liberty of using Dmitry’s pattern and made a version without perforation.
Source Atle Mo
Formed from a tile based on a drawing from 'Viaggi d'un artista nell'America Meridionale', Guido Boggiani, 1895.
Source Firkin
A seamless pattern recreated from an image on Pixabay. It is reminiscent of parquet flooring and is formed from a square tile, which can be recovered in Inkscape by selecting the ungrouped rectangle and using shift-alt-I together.
Source Firkin
Prismatic Floral Pattern 3 Variation 3 No Background
Source GDJ
Seamless pattern inspired by a drawing on Pixabay. To get the tile this is formed from, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Fix side and a seamless pattern formed from circles.
Source SliverKnight
A light gray wall or floor (you decide) of concrete.
Source Atle Mo