Remixed from a design seen in 'Burghley. The Life of William Cecil', William Charlton, 1857. The tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
From a drawing in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.
Source Firkin
Background Wall, Art Abstract, white Well & CC0 texture.
Source Ractapopulous
You know I love paper patterns. Here is one from Stephen. Say thank you!
Source Stephen Gilbert
Background Wall, Art Abstract, Blue Well & CC0 texture.
Source Ractapopulous
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Here's a camo print with more tan and less green, such as might be used in a desert scenario. This is tileable, so it can be used as a wallpaper or background.
Source Eady
More bright luxury. This is a bit larger than fancy deboss, and with a bit more noise.
Source Viszt Péter
Not a pattern for fabrics, but one produced from a jpg of a stack of fabric items that was posted on Pixabay. The tile that this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
The square tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
A seamless pattern with green and yellow diagonal lines on top of a white dotted background.
Source V. Hartikainen
With a name this awesome, how can I go wrong?
Source Nikolay Boltachev
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
Washi (和紙?) is a type of paper made in Japan. Here’s the pattern for you!
Source Carolynne
This is a seamless pattern which is derived from a flower petal image.
Source Yamachem
A heavy hitter at 400x400px, but lovely still.
Source Breezi
A new one called white wall, not by me this time.
Source Yuji Honzawa
A seamless pattern that includes the original tile (go to Objects / Pattern / Pattern To Objects in Inkscape's menu to extract it).
Source GDJ
This light background pattern has a texture of "frozen" surface with diagonal stripes. Here's an yet another addition to the collection of free website backgrounds.
Source V. Hartikainen