One more updated pattern. Not really carbon fiber, but it’s the most popular pattern, so I’ll give you an extra choice.
Source Atle Mo
Nicely executed tiling for an interesting pattern.
Source Ignasi Àvila Padró
A seamless pattern from a tile drawn in Paint.net and vectorised in Vector Magic
Source Firkin
Non-seamless pattern drawn in Paint.net and vectorised in Vector Magic.
Source Firkin
Zero CC tileable ground cracked, crackled, texture, made by me.
Source Sojan Janso
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
CC0 and seamless wellington boot pattern.
Source SliverKnight
Tweed is back in style – you heard it here first. Also, the @2X version here is great!
Source Simon Leo
A seamless textured paper for backgrounds. Colored in pale orange hues.
Source V. Hartikainen
Formed from a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Background Wall, Art Abstract, Star Well & CC0 texture.
Source Ractapopulous
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
Classic 45-degree pattern, light version.
Source Luke McDonald
Embossed lines and squares with subtle highlights.
Source Alex Parker
To get the tile this is based on, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
Number 3 in a series of 5 beautiful patterns. Can be found in colors on the submitter’s website.
Source Janos Koos
Remixed from a drawing that was uploaded to Pixabay by ractapopulous
Source Firkin
Pattern produced in Paint.net using the Vibrato plug-in.
Source Firkin
An abstract web texture of a polished blue stone (or does it look more like ice).
Source V. Hartikainen
I have no idea what J Boo means by this name, but hey – it’s hot.
Source j Boo