A grayscale fabric pattern with vertical lines of stitch holes.
Source V. Hartikainen
A heavy hitter at 400x400px, but lovely still.
Source Breezi
Classy golf-pants pattern, or crossed stripes if you will.
Source Will Monson
Abstract Tiled Background Extended 6
Source GDJ
A seamless tessellation pattern. To get the tile this is formed from, select the pattern in Inkscape and use shift+alt+i.
Source Firkin
From a drawing in 'Storia del Palazzo Vecchio in Firenze', Aurelio Gotti, 1889.
Source Firkin
One more in the line of patterns inspired by Japanese/Asian styles. Smooth.
Source Kim Ruddock
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Prismatic Polka Dots 3 No Background
Source GDJ
CC0 remixed from a drawing. Walter Crane, 1914, Firkin.
Source SliverKnight
Light and tiny, just the way you like it.
Source Rohit Arun Rao
Background formed from the original with an emboss effect
Source GDJ
Love the style on this one, very fresh. Diagonal diamond pattern. Get it?
Source INS
The tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
Prismatic Curved Diamond Pattern No Background
Source GDJ
People seem to enjoy dark patterns, so here is one with some circles.
Source Atle Mo
Got some felt in my mailbox today, so I scanned it for you to use.
Source Atle Mo
Derived from an image that was uploaded to Pixabay by Kaz
Source Firkin
A bit strange this one, but nice at the same time.
Source Diogo Silva