This is sort of fresh, but still feels a bit old school.
Source Martuchox
From a drawing in 'Resa i Afrika, genom Angola, Ovampo och Damaraland', P. Moller, 1899.
Source Firkin
Black brick wall pattern. Brick your site up!
Source Alex Parker
A seamless pattern from a tile made from a jpg on Pixabay. To get the tile select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Background pattern originally a PNG drawn in Paint.net
Source Firkin
Seamless Prismatic Geometric Pattern With Background
Source GDJ
Remixed from a drawing in 'Paul's Sister', Frances Peard, 1889.
Source Firkin
Tile available in Inkscape using shift-alt-i on the selected rectangle
Source Firkin
Abstract Tiled Background Extended 12
Source GDJ
A seamless pattern formed from a square tile. The tile can be retrieved by selecting the rectangle in Inkscape and using shift-alt-I.
Source Firkin
Same as Silver Scales, but in black. Turn your site into a dragon with this great scale pattern.
Source Alex Parker
Prismatic Snowflakes Pattern 2 No Background
Source GDJ
These dots are already worn for you, so you don’t have to.
Source Matt McDaniel
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
From an image on opengameart.org shared by rubberduck.
Source Firkin
Vertical lines with a bumpy, yet crisp, feel to it.
Source Raasa
No, not the band but the pattern. Simple squares in gray tones, of course.
Source Atle Mo
Light honeycomb pattern made up of the classic hexagon shape.
Source Federica Pelzel
Prismatic Polka Dots 3 No Background
Source GDJ
Did some testing with Repper Pro tonight, and this gray mid-tone pattern came out.
Source Atle Mo
Don’t look at this one too long if you’re high on something.
Source Luuk van Baars
A free seamless background with pink spots.
Source V. Hartikainen
Vector version of a png that was uploaded to Pixabay by pencilparker
Source Firkin
Not so subtle. These tileable wood patterns are very useful.
Source Elemis
Alternative colour scheme. Not a pattern for fabrics, but one produced from a jpg of a stack of fabric items that was posted on Pixabay. The tile that this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin