The classic notebook paper with horizontal stripes.
Source Are Sundnes
Prismatic Groovy Concentric Background 3
Source GDJ
Pass parameters to the URL or edit the source code variables to configure the graph paper for the division desired.
Source JayNick
Seamless Dark Grunge Texture. Here's a new grunge texture for use as a background.
Source V. Hartikainen
Zero CC tileable wood texture, made by me procedurally in Neo Texture Edit.
Source Sojan Janso
Remixed from a drawing in 'Hungary. A guide book. By several authors', 1890.
Source Firkin
An abstract texture of black metal pipes (seamless).
Source V. Hartikainen
Colourful background achieved with gradient fills.
Source Firkin
You don’t see many mid-tone patterns here, but this one is nice.
Source Joel Klein
A playful triangle pattern with different shades of gray.
Source Dimitrie Hoekstra
This background pattern contains a texture of yellow wood planks. I think it looks quite original.
Source V. Hartikainen
A seamless pattern made from the gold Penrose triangle by GDJ and the two remixes
Source Firkin
This was formed by distorting an image of a background on Pixabay.
Source Firkin
A seamless stone-like background for blogs or any other type of websites.
Source V. Hartikainen
Greyscale version of a pattern that came out of playing with the 'light rays' plug-in for Paint.net
Source Firkin
Just like your old suit, all striped and smooth.
Source Alex Berkowitz
Remixed from a drawing in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892. The tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Background Wall, Art Abstract, Block Well & CC0 texture.
Source Ractapopulous
A rusty grunge background for websites. Feel free to use it in your site's theme.
Source V. Hartikainen