Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
Carbon fiber is never out of fashion, so here is one more style for you.
Source Alfred Lee
Just the symbols of the signs of the zodiac distributed in a chequer board-like pattern
Source Firkin
The Grid. A digital frontier. I tried to picture clusters of information as they traveled through the computer.
Source Haris Šumić
Prismatic Curved Diamond Pattern 3 No Background
Source GDJ
A bit of scratched up grayness. Always good.
Source Dmitry
Sharp pixel pattern looking like some sort of fabric.
Source Dmitry
Prismatic Geometric Pattern Variation 2 With Background
Source GDJ
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
Luxurious looking pattern (for a T-shirt maybe?) with a hint of green.
Source Simon Meek
Remixed from a drawing in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.
Source Firkin
A comeback for you: the popular Escheresque, now in black.
Source Patten
The image depicts a seamless pattern of a tortoise in tortoiseshell (hexagon).
Source Yamachem
Not even 1kb, but very stylish. Gray thin lines.
Source Struck Axiom
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
By popular request, an outline version of the pentagon pattern.
Source Atle Mo
Prismatic Hexagonalist Pattern No Background
Source GDJ
Prismatic Polka Dots Mark II 3 No Background
Source GDJ
A free seamless background texture that looks like a brown stone wall.
Source V. Hartikainen