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
The tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
The classic subtle pattern. Sort of wall/brick looking. Or moon-looking?
Source Joel Klein
A cute x, if you need that sort of thing.
Source Juan Scrocchi
Imagine you zoomed in 1000X on some fabric. But then it turned out to be a skeleton!
Source Angelica
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
Seamless Prismatic Geometric Pattern With Background
Source GDJ
Sounds like something from World of Warcraft. Has to be good.
Source Tony Kinard
This one has rusty dark brown texture.
Source V. Hartikainen
Black And White Floral Pattern Background Inverse
Source GDJ
Light honeycomb pattern made up of the classic hexagon shape.
Source Federica Pelzel
Washi (和紙?) is a type of paper made in Japan. Here’s the pattern for you!
Source Carolynne
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
You could get a bit dizzy from this one, but it might come in handy.
Source Dertig Media
A set of paper filters. The base texture is generated the same way, only the compositing mode is varied.
Source Lazur URH
Sort of reminds me of those old house wallpapers.
Source Tish
A seamless dark leather-like background texture with diagonal lines that look like stitches.
Source V. Hartikainen
Abstract Ellipses Background Grayscale
Source GDJ
White circles connecting on a light gray background.
Source Mark Collins
A seamless pattern of leopard skin. It should look nice as a background element on web pages.
Source V. Hartikainen
A new one called white wall, not by me this time.
Source Yuji Honzawa
One more brick pattern. A bit more depth to this one.
Source Benjamin Ward