Medium gray fabric pattern with 45-degree lines going across.
Source Atle Mo
Stefan is hard at work, this time with a funky pattern of squares.
Source Stefan Aleksić
This one is amazing, truly original. Go use it!
Source Viahorizon
It was called Navy Blue, but I made it dark. You know, the way I like it.
Source Ethan Hamilton
A seamless pattern formed from a tile that can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
Could be paper, could be a Polaroid frame – up to you!
Source Chaos
A grid of squares with green colours. Since the colours are randomly distributed it is automatically seamless.
Source Firkin
This one is something special. I’d call it a flat pattern, too. Very well done, sir!
Source GetDiscount
A seamless pattern the unit cell for which can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Prismatic Hexagonalism Pattern No Background
Source GDJ
A series of 5 patterns. That’s what the P stands for, if you didn’t guess it.
Source Dima Shiper
Prismatic Abstract Geometric Background 4
Source GDJ
Vector version of a png that was uploaded to Pixabay by pencilparker
Source Firkin
A seamless pattern formed from background pattern 102
Source Firkin
Prismatic Floral Pattern 3 Variation 3 No Background
Source GDJ
Got some felt in my mailbox today, so I scanned it for you to use.
Source Atle Mo
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
A black tile-able background with paper-like texture.
Source V. Hartikainen
More in the paper realm, this time with fibers.
Source Jorge Fuentes
Remixed from a drawing in 'Paul's Sister', Frances Peard, 1889.
Source Firkin
A playful triangle pattern with different shades of gray.
Source Dimitrie Hoekstra