Classy golf-pants pattern, or crossed stripes if you will.
Source Will Monson
This one takes you back to math class. Classic mathematic board underlay.
Source Josh Green
The tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
A seamless design of flowers remixed from a jpg on Pixabay by Prawny.
Source Firkin
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Neat little photography icon pattern.
Source Hossam Elbialy
A light background pattern with diagonal stripes. Here's a simple light striped background for you.
Source V. Hartikainen
ZeroCC tileable moss texture, photographed and made by me. CC0
Source Sojan Janso
Brushed aluminum, in a bright gray version. Lovely 2X as well.
Source Andre Schouten
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
Light gray version of the Binding pattern that looks a bit like fabric.
Source Newbury
Medium gray fabric pattern with 45-degree lines going across.
Source Atle Mo
This background pattern contains worn out colorful stripes as a texture.
Source V. Hartikainen
Remixed from an image that was uploaded to Pixabay by Pixeline
Source Firkin
Kaleidoscope Prismatic Abstract No Background
Source GDJ
A playful triangle pattern with different shades of gray.
Source Dimitrie Hoekstra
One of the few full-color patterns here, but this one was just too good to pass up.
Source Alexey Usoltsev
Prismatic Triangular Background Design Mark II 5
Source GDJ
The act or state of corrugating or of being corrugated, a wrinkle; fold; furrow; ridge.
Source Anna Litvinuk
Remixed from a PNG that was uploaded to Pixabay by VictorianLady
Source Firkin
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
Dark pattern with some nice diagonal stitched lines crossing over.
Source Ashton