A mid-tone gray pattern with some cement looking texture.
Source Hendrik Lammers
Bright gray tones with a hint of some metal surface.
Source Hendrik Lammers
A light background pattern with diagonal stripes. Here's a simple light striped background for you.
Source V. Hartikainen
Seamless pattern formed from a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
Tweed is back in style – you heard it here first. Also, the @2X version here is great!
Source Simon Leo
A huge one at 800x600px. Made from a photo I took going home after work.
Source Atle Mo
Light and tiny, just the way you like it.
Source Rohit Arun Rao
Sometimes simple really is what you need, and this could fit you well.
Source Factorio.us Collective
Prismatic Curved Diamond Pattern 2 No Background
Source GDJ
Greyscale version of a pattern that came out of playing with the 'light rays' plug-in for Paint.net
Source Firkin
A version without colours blended together to give a different look.
Source Firkin
This is a seamless pattern which is derived from a flower petal image.
Source Yamachem
One more from Badhon, sharp horizontal lines making an embossed paper feeling.
Source Badhon Ebrahim
A browner version of the original weathered fence texture.
Source Firkin
Same as the black version, but now in shades of gray. Very subtle and fine grained.
Source Atle Mo
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
This is lovely, just the right amount of subtle noise, lines and textures.
Source Richard Tabor
A nice light textile pattern for your kit.
Source N8rx
Background Wall, Art Abstract, white Well & CC0 texture.
Source Ractapopulous
New paper pattern with a slightly organic feel to it, using some thin threads.
Source Atle Mo
From a drawing in 'Navigations de Alouys de Cademoste.-La Navigation du Capitaine Pierre Sintre', Alvise da ca da Mosto, 1895.
Source Firkin
Remixed from a drawing in 'Prehistoric Man: researches into the origin of civilisation in the old and the new world', Daniel Wilson, 1876.
Source Firkin
This is so subtle I hope you can see it! Tweak at will.
Source Alexandre Naud
The edges of all the red objects line up either vertically or horizontally, but it doesn't appear so. Made from a square tile that can be got by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
There are many carbon patterns, but this one is tiny.
Source Designova
Hexagonal dark 3D pattern. What more can you ask for?
Source Norbert Levajsics