Prepared mostly as a raster in Paint.net and vectorised.
Source Firkin
A background pattern inspired by designs seen in 'Burghley. The Life of William Cecil', William Charlton, 1857.
Source Firkin
A re-make of the Gradient Squares pattern.
Source Dimitar Karaytchev
If you want png files of this u can download them here : viscious-speed.deviantart.com/gallery/27635117
Source Viscious-Speed
One more from Badhon, sharp horizontal lines making an embossed paper feeling.
Source Badhon Ebrahim
Prismatic Abstract Line Art Pattern Background 2
Source GDJ
Remixed from a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
Paper pattern with small dust particles and 45-degree strokes.
Source Atle Mo
Bright Multicolored Floral Background by Karen Arnold from PDP.
Source GDJ
Prismatic Polka Dots Mark II No Background
Source GDJ
8 by 8 pixels, and just what the title says.
Source pixilated
Farmer could be some sort of fabric pattern, with a hint of green.
Source Fabian Schultz
Just the symbols of the signs of the zodiac distributed in a chequer board-like pattern
Source Firkin
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
Background Wall, Art Abstract, Blue Well & CC0 texture.
Source Ractapopulous
To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
A large pattern with funky shapes and form. An original. Sort of origami-ish.
Source Luuk van Baars
A seamless texture of worn out "cardboard".
Source V. Hartikainen
Medium gray pattern with small strokes to give a weave effect.
Source Catherine
Remixed from a drawing in 'A Child of the Age', Francis Adams, 1894.
Source Firkin
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Lovely light gray floral motif with some subtle shades.
Source GraphicsWall
One of the few full-color patterns here, but this one was just too good to pass up.
Source Alexey Usoltsev