From an image on opengameart.org shared by rubberduck.
Source Firkin
An emulated “transparent” background pattern, like that of all kinds of computer graphics software.
Source AdamStanislav
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
Sharp diamond pattern. A small 24x18px tile.
Source Tom Neal
The following repeating website background is colored in a blue gray color and resembles a concrete wall or something similar to it.
Source V. Hartikainen
From a drawing in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.
Source Firkin
With a name this awesome, how can I go wrong?
Source Nikolay Boltachev
Same classic 45-degree pattern, dark version.
Source Luke McDonald
A white version of the very popular linen pattern.
Source Ant Ekşiler
It’s big, it’s gradient—and it’s square.
Source Brankic1979
Sweet and subtle white plaster with hints of noise and grunge.
Source Phil Maurer
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Fix and cc0 to get the tile this is based on.
Source SliverKnight
A dark gray, sandy pattern with small light dots, and some angled strokes.
Source Atle Mo
Submitted in a cream color, but you know how I like it.
Source Devin Holmes
Inspired by a pattern found in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.
Source Firkin
Can never have too many knitting patterns, especially as nice as this.
Source Victoria Spahn
A lovely light gray pattern with stripes and a dash of noise.
Source V. Hartikainen