Abstract Arbitrary Geometric Background derived from an image on Pixabay.
Source GDJ
From a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
Here's a seamless brown cork board background texture. Feel free to download or reshare if you like.
Source V. Hartikainen
Got some felt in my mailbox today, so I scanned it for you to use.
Source Atle Mo
From a drawing in 'Real Sailor-Songs', John Ashton, 1891.
Source Firkin
A free pink background pattern.
Source V. Hartikainen
Inspired by a pattern found in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.
Source Firkin
You guessed it – looks a bit like cloth.
Source Peax Webdesign
Carbon fiber is never out of fashion, so here is one more style for you.
Source Alfred Lee
White circles connecting on a light gray background.
Source Mark Collins
Kaleidoscope Prismatic Abstract No Background
Source GDJ
A pattern derived from repeating unit cells each derived from part of a fractal rendering in paint.net.
Source Firkin
A seamless pattern from a tile drawn in Paint.net and vectorised in Vector Magic
Source Firkin
Super simple but very nice indeed. Gray with vertical stripes.
Source Merrin Macleod
A free seamless background image with a texture of dark red "canvas". It should look very nice on web sites.
Source V. Hartikainen
To get the tile this is formed from select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Prismatic Hypnotic Pattern 2 No Background
Source GDJ
After 1 comes 2, same but different. You get the idea.
Source Hendrik Lammers
Remixed from a JPG that was uploaded to Pixabay by theasad121
Source Firkin
Used a cherry by doctormo to make this seamless pattern
Source Firkin
The basic shapes never get old. Simple triangle pattern.
Source Atle Mo