Remixed from a drawing in 'The Canadian horticulturist', 1892
Source Firkin
This was formed by distorting an image of a background on Pixabay.
Source Firkin
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
A background tile for web with abstract repeating texture of dark "stone wall".
Source V. Hartikainen
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Colour version of the original seamless pattern.
Source Firkin
Tile available in Inkscape using shift-alt-i on the selected rectangle
Source Firkin
Prismatic Geometric Pattern Background No Black
Source GDJ
This pattern comes in orange, and it looks as if it is "made of glass".
Source V. Hartikainen
A seamless background drawn in Paint.net and vectorised with Vector Magic. The starting point was a photograph of drinking straws from Pixabay.
Source Firkin
Remixed from an image that was uploaded to Pixabay by Pixeline
Source Firkin
A dark metallic background with a pattern of stamped dots. Here's a dark "metallic" background pattern for you.
Source V. Hartikainen
This is so subtle I hope you can see it! Tweak at will.
Source Alexandre Naud
To get the tile this is based on, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Bit of a strange name on this one, but still nice. Tiny gray square things.
Source Carlos Valdez
I asked Gjermund if he could make a pattern for us – result!
Source Gjermund Gustavsen
A background pattern with green vertical stripes. A new striped background pattern. This time a green one.
Source V. Hartikainen
Lovely pattern with some good-looking non-random noise lines.
Source Zucx
Formed from a tile based on a drawing from 'Viaggi d'un artista nell'America Meridionale', Guido Boggiani, 1895.
Source Firkin
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
The green fibers pattern will work very well in grayscale as well.
Source Matteo Di Capua