The starting point for this was a texture drawn with the 'Radial Colors' plug-in in Paint.net.
Source Firkin
Prismatic Groovy Concentric Background 4
Source GDJ
The file was named striped lens, but hey – Translucent Fibres works too.
Source Angelica
New paper pattern with a slightly organic feel to it, using some thin threads.
Source Atle Mo
From a drawing in 'In an Enchanted Island', William Mallock, 1892.
Source Firkin
Sometimes simple really is what you need, and this could fit you well.
Source Factorio.us Collective
Could be paper, could be a Polaroid frame – up to you!
Source Chaos
To get the tile this is based on, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Same as Silver Scales, but in black. Turn your site into a dragon with this great scale pattern.
Source Alex Parker
After 1 comes 2, same but different. You get the idea.
Source Hendrik Lammers
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
This background pattern looks like bamboo to me. Feel free to download it for your website (for your blog perhaps?).
Source V. Hartikainen
More in the paper realm, this time with fibers.
Source Jorge Fuentes
Adapted from a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
The square tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
From a drawing in 'Resa i Afrika, genom Angola, Ovampo och Damaraland', P. Moller, 1899.
Source Firkin
A seamless pattern formed from a square tile. The tile can be retrieved by selecting the rectangle in Inkscape and using shift-alt-i
Source Firkin
It almost looks a bit blurry, but then again, so are fishes.
Source Petr Šulc
This was formed by distorting an image of a background on Pixabay.
Source Firkin
A free seamless background texture that looks like a brown stone wall.
Source V. Hartikainen
Derived from an image that was uploaded to Pixabay by Kaz
Source Firkin
Dark, crisp and subtle. Tiny black lines on top of some noise.
Source Wilmotte Bastien
Zero CC tileable dry grass texture, photographed and made by me. CC0
Source Sojan Janso