Bigger is better, right? So here you have some large carbon fiber.
Source Factorio.us Collective
Sometimes simple really is what you need, and this could fit you well.
Source Factorio.us Collective
This is so subtle: We’re talking 1% opacity. Get your squint on!
Source Atle Mo
Real snow that tiles, not easy. This is not perfect, but an attempt.
Source Atle Mo
Prismatic Groovy Concentric Background 2 No Black
Source GDJ
A repeating gloomy background image. This one consists of a pattern of black chains layered on top of a dark textured background.
Source V. Hartikainen
Prismatic Groovy Concentric Background
Source GDJ
"Beige Stone", Tileable Texture.
Source V. Hartikainen
A monochrome pattern from a tile that can be had by selecting the rectangle in Inkscaope and using shift+alt+i
Source Firkin
Prismatic Polka Dots 3 No Background
Source GDJ
Prismatic Hexagonalism Pattern No Background
Source GDJ
High detail stone wall with minor cracks and specks.
Source Projecteightyfive
Prismatic Geometric Pattern Variation 2 With Background
Source GDJ
A nice and simple gray stucco material. Great on its own, or as a base for a new pattern.
Source Bartosz Kaszubowski
Remixed from a design on Pixabay. To get the tile this is based on select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
So tiny, just 7 by 7 pixels – but still so sexy. Ah yes.
Source Dmitriy Prodchenko
Submitted by DomainsInfo – wtf, right? But hey, a free pattern.
Source DomainsInfo
Made by distorting a simple pattern using the 'sin waves' plugin for Paint.net and vectorising in Vector Magic
Source Firkin
Light square grid pattern, great for a “DIY projects” sort of website, maybe?
Source Rafael Almeida
Heavy depth and shadows here, but might work well on some mobile apps.
Source Damian Rivas
Geometric triangles seem to be quite hot these days.
Source Pixeden
Abstract Tiled Background Extended 10
Source GDJ
8 by 8 pixels, and just what the title says.
Source pixilated
A background pattern with green vertical stripes. A new striped background pattern. This time a green one.
Source V. Hartikainen
Derived from a drawing in 'At home', J. Sowerby, J. Crane and T. Frederick, 1881.
Source Firkin