Dark and hard, just the way we like it. Embossed triangles makes a nice pattern.
Source Ivan Ginev
It’s okay to be square! A nice light gray pattern with random squares.
Source Waseem Dahman
A slightly grainy paper pattern with small horizontal and vertical strokes.
Source Atle Mo
Sharp pixel pattern, just like the good old days.
Source Paridhi
From a drawing in 'Uit de geschiedenis der Heilige Stede te Amsterdam', Yohannes Sterck, 1898.
Source Firkin
Nice and simple crossed lines in dark gray tones.
Source Stefan Aleksić
Embossed lines and squares with subtle highlights.
Source Alex Parker
You guessed it – looks a bit like cloth.
Source Peax Webdesign
A seamless pattern formed from a sports car on clker.com. To get the tile, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Seamless pattern formed from a tile that can be extracted by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
The image is a design of blue glass.How about using it as background image?
Source Yamachem
A seamless pattern the starting point for which was a 'rainbow twist' texture in Paint.net.
Source Firkin
Prismatic Basic Pattern 2 No Background
Source GDJ
Drawn in Paint.net using the kaleidoscope plug-in and vectorised.
Source Firkin
Prismatic Groovy Concentric Background 2
Source GDJ
Drawn in Paint.net and vectorised in Vector Magic.
Source Firkin
Prismatic Isometric Cube Wireframe Pattern No Background
Source GDJ
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin