From a drawing in 'Prose and Verse ', William Linton, 1836.
Source Firkin
Got some felt in my mailbox today, so I scanned it for you to use.
Source Atle Mo
Dark squares with some virus-looking dots in the grid.
Source Hugo Loning
Derived from a drawing in 'The Murmur of the Shells', Samuel Cowen, 1879.
Source Firkin
Abstract Ellipses Background Grayscale
Source GDJ
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
Seamless pattern the basic tile for which can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
A seamless pattern from a tile made from a jpg on Pixabay. To get the tile select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
From a drawing in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.
Source Firkin
One of the few full-color patterns here, but this one was just too good to pass up.
Source Alexey Usoltsev
Background Wall, Art Abstract, Blue Well & CC0 texture.
Source Ractapopulous
Scanned some rice paper and tiled it up for you. Enjoy.
Source Atle Mo
Colored maple leaves scattered on a surface. This is tileable, so it can be used as a background or wallpaper.
Source Eady
Here's an yet another background for websites, with a seamless texture of wood planks this time.
Source V. Hartikainen
If you want png files of this u can download them here : viscious-speed.deviantart.com/gallery/27635117
Source Viscious-Speed
Number 2 in a series of 5 beautiful patterns. Can be found in colors on the submitter’s website.
Source Janos Koos
This one is super crisp at 2X. Lined paper with some dust and scratches.
Source HQvectors
Bright gray tones with a hint of some metal surface.
Source Hendrik Lammers
Found on the ground in french cafe in kunming, Yunnan, china
Source Rejon
People seem to enjoy dark patterns, so here is one with some circles.
Source Atle Mo
Formed by distorting a JPG from PublicDomainPictures
Source Firkin