Zero CC tileable bark texture, photographed and made by me. CC0
Source Sojan Janso
A seamless pattern formed from a square tile. To get the tile, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Clean and crisp lines all over the place. Wrap it up with this one.
Source Dax Kieran
Inspired by this, I came up with this pattern. Madness!
Source Atle Mo
A background tile for web with abstract repeating texture of dark "stone wall".
Source V. Hartikainen
Not the most creative name, but it’s a good all-purpose light background.
Source Dmitry
A seamless pattern with green and yellow diagonal lines on top of a white dotted background.
Source V. Hartikainen
Could be paper, could be a Polaroid frame – up to you!
Source Chaos
Derived from an image that was uploaded to Pixabay by Kaz
Source Firkin
Light gray grunge wall with a nice texture overlay.
Source Adam Anlauf
Prismatic Chevrons Pattern 5 With Background
Source GDJ
A free seamless background texture that looks like a brown stone wall.
Source V. Hartikainen
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
Zero CC tileable cork floor, photographed and made by me. CC0
Source Sojan Janso
From a drawing in 'The Quiver of Love', Walter Crane, 1876
Source Firkin
Zero CC tileable bark texture, photographed and made by me. CC0
Source Sojan Janso