A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Prismatic Polka Dots 3 No Background
Source GDJ
Prismatic Snowflakes Pattern No Background
Source GDJ
Remixed from a design seen in 'Burghley. The Life of William Cecil', William Charlton, 1857
Source Firkin
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
Prismatic Curved Diamond Pattern 4 No Background
Source GDJ
A hint of orange color, and some crossed and embossed lines.
Source Adam Anlauf
Remixed from a raster on Pixabay, that was uploaded by ArtsyBee.
Source Firkin
Looks like a technical drawing board: small squares forming a nice grid.
Source We Are Pixel8
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Everyone needs some stardust. Sprinkle it on your next project.
Source Atle Mo
Prismatic Curved Diamond Pattern 2 No Background
Source GDJ
Very dark pattern with some noise and 45-degree lines.
Source Stefan Aleksić
Prepared mostly as a raster in Paint.net and vectorised.
Source Firkin
Seamless pattern the tile for which can be had by using shift-alt-I on the selected rectangle in Inkscape.
Source Firkin
Drawn in Paint.net and vectorised in Vector Magic.
Source Firkin
Not strictly seamless in that opposite edges are not identical. But they do marry up to make an interesting pattern
Source Firkin
A seamless pattern from a tile drawn in Paint.net and vectorised in Vector Magic
Source Firkin
A bit like smudged paint or some sort of steel, here is scribble light.
Source Tegan Male
Prismatic Groovy Concentric Background 4 No Black
Source GDJ
Tweed is back in style – you heard it here first. Also, the @2X version here is great!
Source Simon Leo
Super detailed 16×16 tile that forms a beautiful pattern of straws.
Source Pavel
A seamless dark leather-like background texture with diagonal lines that look like stitches.
Source V. Hartikainen