Not so subtle. These tileable wood patterns are very useful.
Source Elemis
The name alone is awesome, but so is this sweet dark pattern.
Source Federica Pelzel
Pass parameters to the URL or edit the source code variables to configure the graph paper for the division desired.
Source JayNick
Abstract Geometric Monochrome Pattern Prismatic No Background
Source GDJ
Remixed from a drawing in 'Jezebel's Daughter', Wilkie Collins 1880
Source Firkin
A pattern formed from a squared tile. The tile can be accessed in Inkscape by selecting the rectangle and using shift-alt-i.
Source Firkin
A seamless chequerboard pattern formed from a tile that can be had in Inkscape by selecting the rectangle and using shift+alt+i. Alternative colour scheme.
Source Firkin
Have you wondered about how it feels to be buried alive? Here is the pattern for it.
Source Hendrik Lammers
A nice and simple white rotated tile pattern.
Source Another One
Not the Rebel alliance, but a dark textured pattern.
Source Hendrik Lammers
Sounds like something from World of Warcraft. Has to be good.
Source Tony Kinard
People seem to enjoy dark patterns, so here is one with some circles.
Source Atle Mo
Zero CC tileable hard cover cells book texture, 4k, scanned and made by me. CC0
Source Sojan Janso
From a drawing in 'In an Enchanted Island', William Mallock, 1892.
Source Firkin
This is so subtle: We’re talking 1% opacity. Get your squint on!
Source Atle Mo
Prismatic Geometric Pattern Background
Source GDJ
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
A new one called white wall, not by me this time.
Source Yuji Honzawa
Zero CC tileable cork floor, photographed and made by me. CC0
Source Sojan Janso
Prismatic Groovy Concentric Background 2 No Black
Source GDJ
The tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
To get the tile this is formed from select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Pixel by pixel, sharp and clean. Very light pattern with clear lines.
Source M.Ashok
Alternative colour scheme to the original.
Source Firkin
A seamless stone-like background for blogs or any other type of websites.
Source V. Hartikainen
To get the tile this is based on, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
A set of paper filters. The base texture is generated the same way, only the compositing mode is varied.
Source Lazur URH