Same classic 45-degree pattern, dark version.
Source Luke McDonald
Light gray grunge wall with a nice texture overlay.
Source Adam Anlauf
Super detailed 16×16 tile that forms a beautiful pattern of straws.
Source Pavel
Seamless Green Tile Background
Source V. Hartikainen
A background formed from an image of an old tile on the New York Metropolitan Museum of Art website. To get the base tile, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Prismatic Abstract Geometric Background 5
Source GDJ
You were craving more leather, so I whipped this up by scanning a leather jacket.
Source Atle Mo
Submitted by DomainsInfo – wtf, right? But hey, a free pattern.
Source DomainsInfo
More tactile goodness. This time in the form of some rough cloth.
Source Bartosz Kaszubowski
Derived from an image that was uploaded to Pixabay by Kaz
Source Firkin
Prismatic Geometric Pattern Background 2
Source GDJ
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
A seamless green background texture. The image is distributed under a Creative Commons License (like all of the images here).
Source V. Hartikainen
You know, tiny and sharp. I’m sure you’ll find a use for it.
Source Atle Mo
You know you can’t get enough of these linen-fabric-y patterns.
Source James Basoo
Seamless pattern formed from a tile that can be extracted by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
Based on an image that was uploaded to Pixabay by devanath
Source Firkin
It’s a hole, in a pattern. On your website. Dig it!
Source Josh Green
Prismatic Curved Diamond Pattern 6 No Background
Source GDJ
Made by distorting a simple pattern using the 'sin waves' plugin for Paint.net and vectorising in Vector Magic
Source Firkin
Washi (和紙?) is a type of paper made in Japan. Here’s the pattern for you!
Source Carolynne
Bit of a strange name on this one, but still nice. Tiny gray square things.
Source Carlos Valdez
Here's an yet another seamless note paper texture for use as a background on websites.
Source V. Hartikainen
Zero CC tileable seed texture, edited by me to be seamless from a Pixabay image. CC0
Source Sojan Janso
Not so subtle. These tileable wood patterns are very useful.
Source Elemis