A seamless pattern from a tile drawn in Paint.net and vectorised in Vector Magic
Source Firkin
There are many carbon patterns, but this one is tiny.
Source Designova
Wasn't satisfied with the original's colouring. Too much component transfer and colormatrixes yet the results are lacking a bit. So this time it is a simple black to transparent fade, making it possible remixing easily once there will be other blending modes supported as well. Probably in inkscape 0.92.
Source Lazur URH
From a drawing in 'Artists and Arabs', Henry Blackburn, 1868
Source Firkin
Could remind you a bit of those squares in Super Mario Bros, yeh?
Source Jeff Wall
A bit like smudged paint or some sort of steel, here is scribble light.
Source Tegan Male
One of the few full-color patterns here, but this one was just too good to pass up.
Source Alexey Usoltsev
It has waves, so make sure you don’t get sea sickness.
Source CoolPatterns
Prismatic Groovy Concentric Background 2 No Black
Source GDJ
High detail stone wall with minor cracks and specks.
Source Projecteightyfive
Remixed from a drawing in 'Hungary. A guide book. By several authors', 1890.
Source Firkin
Prismatic Hexagonalism Pattern No Background
Source GDJ
Prismatic Groovy Concentric Background 2
Source GDJ
A repeating background with dark brown stone-like texture and abstract pattern that looks like tree trunks.
Source V. Hartikainen
From a drawing in 'La Principauté de Liège et les Pays-Bas au XVIe siècle', Société des Bibliophiles Liégeois ,1887.
Source Firkin
I’m not going to lie – if you submit something with the words Norwegian and Rose in it, it’s likely I’ll publish it.
Source Fredrik Scheide
The tile this fill pattern is based on can be had by using shift+alt+i on the rectangle.
Source Firkin
Classy golf-pants pattern, or crossed stripes if you will.
Source Will Monson
A seamless pattern based on a tile that can be achieved by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
More carbon fiber for your collections. This time in white or semi-dark gray.
Source Badhon Ebrahim
A heavy hitter at 400x400px, but lovely still.
Source Breezi