This one looks like a cork panel. Feel free to use it as a tiled background on your blog or website.
Source V. Hartikainen
The rectangular tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
Background Wall, Art Abstract, Block Well & CC0 texture.
Source Ractapopulous
The name tells you it has curves. Oh yes, it does!
Source Peter Chon
Seamless Prismatic Pythagorean Line Art Pattern No Background. A seamless pattern that includes the original tile (go to Objects / Pattern / Pattern To Objects in Inkscape's menu to extract it).
Source GDJ
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Scanned some rice paper and tiled it up for you. Enjoy.
Source Atle Mo
Looks like a technical drawing board: small squares forming a nice grid.
Source We Are Pixel8
Looks as if it's spray painted on the wall. You can be sure that this pattern will seamlessly fill your backgrounds on web pages.
Source V. Hartikainen
A brown metallic grid pattern layered on top of a dark fabric texture. It should look great when using as a tiled background on web pages, especially blogs.
Source V. Hartikainen
From a drawing in 'Resa i Afrika, genom Angola, Ovampo och Damaraland', P. Moller, 1899.
Source Firkin
Derived from elements found in a floral ornament drawing on Pixabay.
Source Firkin
Geometric lines are always hot, and this pattern is no exception.
Source Listvetra
Light gray paper pattern with small traces of fiber and some dust.
Source Atle Mo
Sharp pixel pattern looking like some sort of fabric.
Source Dmitry
One more brick pattern. A bit more depth to this one.
Source Benjamin Ward
Colour version of a pattern that came out of playing with the 'light rays' plug-in for Paint.net
Source Firkin
A classic dark tile for a bit of vintage darkness.
Source Listvetra