Utilising a bird from s-light and some flowers from Almeidah. To get the unit tile, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
This could be a hippy vintage wallpaper.
Source Tileable Patterns
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
From a drawing in 'Two Women in the Klondike', Mary Hitchcock, 1899.
Source Firkin
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
Abstract Arbitrary Geometric Background derived from an image on Pixabay.
Source GDJ
We have some linen patterns here, but none that are stressed. Until now.
Source Jordan Pittman
Prismatic Geometric Tessellation Pattern 3 No Background
Source GDJ
A light gray background pattern with seamless fabric-like texture and almost unnoticeable stripes.
Source V. Hartikainen
From a drawing in 'In an Enchanted Island', William Mallock, 1892.
Source Firkin
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
To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Could be paper, could be a Polaroid frame – up to you!
Source Chaos
As far as fabric patterns goes, this is quite crisp.
Source Heliodor Jalba
Dark pattern with some nice diagonal stitched lines crossing over.
Source Ashton
More leather, and this time it’s bigger! You know, in case you need that.
Source Elemis
This background pattern contains a seamless texture of bark. It's not very realistic, but I think it looks quite nice.
Source V. Hartikainen
A seamless pattern formed from cross 4. To get the original tile select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
A seamless pattern the starting point for which was a 'rainbow twist' texture in Paint.net.
Source Firkin