Prismatic Abstract Geometric Background 4 No Black
Source GDJ
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
White circles connecting on a light gray background.
Source Mark Collins
Could remind you a bit of those squares in Super Mario Bros, yeh?
Source Jeff Wall
Medium gray pattern with small strokes to give a weave effect.
Source Catherine
Prismatic Abstract Geometric Background 5 No Black
Source GDJ
Here's a bluish gray striped background pattern for use on web sites.
Source V. Hartikainen
Sometimes you just need the simplest thing.
Source Fabricio
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
From a drawing in 'Heroes of North African Discovery', Nancy Meugens, 1894.
Source Firkin
Nicely crafted paper pattern, although a bit on the large side (500x593px).
Source Blaq Annabiosis
Sort of like the Photoshop transparent background, but better!
Source Alex Parker
Dark wooden pattern, given the subtle treatment. based on texture from Cloaks. https://cloaks.deviantart.com
Source Atle Mo
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
From a drawing in 'Worsborough; its historical associations and rural attractions', Joseph Wilkinson, 1879.
Source Firkin
The name tells you it has curves. Oh yes, it does!
Source Peter Chon
Background Wall, Art Abstract, Blue Well & CC0 texture.
Source Ractapopulous
Background Wall, Art Abstract, Watercolor Vintage style CC0 texture.
Source Ractapopulous
An abstract texture of black metal pipes (seamless).
Source V. Hartikainen
The image depicts a seamless pattern made using a bird's face.
Source Yamachem
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
Used a cherry by doctormo to make this seamless pattern
Source Firkin