Submitted as a black pattern, I made it light and a few steps more subtle.
Source Andy
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
I scanned a paper coffee cup. You know, in case you need it.
Source Atle Mo
A nice and simple white rotated tile pattern.
Source Another One
A seamless background pattern of dark brown wood planks.
Source V. Hartikainen
The image is the remix of "wire-mesh fence seamless pattern" .This is a more minute version of it.Sorry for the file size.Using path>difference in Inkscape, I will cut out any silhouette from this pattern and create a "meshed silhouette".
Source Yamachem
Prismatic Curved Diamond Pattern 4 No Background
Source GDJ
This is a seamless pattern which is derived from a flower petal image.
Source Yamachem
Abstract Ellipses Background Grayscale
Source GDJ
Vector version of a png that was uploaded to Pixabay by pencilparker
Source Firkin
Prismatic Polka Dots Mark II 3 No Background
Source GDJ
This is a remix of "geometrical pattern 01".
Source Yamachem
More tactile goodness. This time in the form of some rough cloth.
Source Bartosz Kaszubowski
To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
From a drawing in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.
Source Firkin
From a drawing in 'In an Enchanted Island', William Mallock, 1892.
Source Firkin
From a drawing in 'Studies for Stories', Jean Ingelow, 1864.
Source Firkin
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
A good starting point for a cardboard pattern. This would work well in a variety of colors.
Source Atle Mo
You don’t see many mid-tone patterns here, but this one is nice.
Source Joel Klein
This is the remix of an OCAL clipart called "Art Nouveau ornament" uploaded by "microcosme".Thanks.This is a seamless pattern of an Art Nouveau ornament.
Source Yamachem
On a large canvas you can see it tiling, but used on smaller areas, it’s beautiful.
Source Paul Phönixweiß
This background image is great for using in web design or graphic design projects. And don't forget to visit the homepage. I frequently update this resource with fresh tileable backgrounds.
Source V. Hartikainen
Sort of like the Photoshop transparent background, but better!
Source Alex Parker
Mostly just mucked about with the colours and made one of the paths in the lead frame opaque. The glass remains transparent.
Source Firkin