Prismatic Curved Diamond Pattern 2 No Background
Source GDJ
Alternative colour scheme. Not a pattern for fabrics, but one produced from a jpg of a stack of fabric items that was posted on Pixabay. The tile that this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
A free background image with a seamless texture of cardboard. This texture of cardboard looks quite realistic, especially when is actually tiled.
Source V. Hartikainen
This one takes you back to math class. Classic mathematic board underlay.
Source Josh Green
An attempt for cleaning up the original image in a few steps.
Source Lazur URH
A seamless pattern formed from a tile that can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
Background Wall, Art Abstract, white Well & CC0 texture.
Source Ractapopulous
Prismatic Groovy Concentric Background 3
Source GDJ
Very simple, very blu(e). Subtle and nice.
Source Seb Jachec
Zero CC tileable wood texture, made by me procedurally in Neo Texture Edit.
Source Sojan Janso
This background pattern looks like bamboo to me. Feel free to download it for your website (for your blog perhaps?).
Source V. Hartikainen
A fun-looking elastoplast/band-aid pattern. A hint of orange tone in this one.
Source Josh Green
The classic 45-degree diagonal line pattern, done right.
Source Jorick van Hees
The image depicts polka dot seamless pattern.
Source Yamachem
Sharp pixel pattern, just like the good old days.
Source Paridhi
From a drawing in 'Artists and Arabs', Henry Blackburn, 1868
Source Firkin
From a drawing in 'Bond Slaves. The story of a struggle.', Isabella Varley, 1893.
Source Firkin
Drawn in Paint.net and vectorised in Vector Magic.
Source Firkin
Based on an image that was uploaded to Pixabay by devanath
Source Firkin
Recreated from a pattern found in 'Az Osztrák-Magyar Monarchia irásban és képben', 1882. To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Remix from a drawing in 'Ostatnie chwile powstania styczniowego', Zygmunt Sulima, 1887.
Source Firkin
Seamless tile drawn in Paint.net and vectorised in Vector Magic.
Source Firkin
Remixed from a drawing in 'Line and form", Walter Crane, 1914.
Source Firkin
A criss-cross pattern similar to one I saw mown into a sports field.
Source Firkin
Vector version of a png that was uploaded to Pixabay by pencilparker
Source Firkin
Dare I call this a «flat pattern»? Probably not.
Source Dax Kieran