Prismatic Groovy Concentric Background 4 No Black
Source GDJ
A white version of the very popular linen pattern.
Source Ant Ekşiler
Seamless pattern the tile for which can be had by using shift-alt-I on the selected rectangle in Inkscape.
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
A lovely light gray pattern with stripes and a dash of noise.
Source V. Hartikainen
To get the tile this is made up from select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
A seamless pattern from a tile drawn in Paint.net and vectorised in Vector Magic
Source Firkin
Actually remixed from a pattern on Pixabay. But then noticed a very similar one on Openclipart.org uploaded by btj51q2.
Source Firkin
Classic vertical lines, in all its subtlety.
Source Cody L
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
Made by distorting a simple pattern using the 'sin waves' plugin for Paint.net and vectorising in Vector Magic
Source Firkin
From a drawing in 'Picturesque New Guinea', J Lindt, 1887.
Source Firkin
CC0 and seamless wellington boot pattern.
Source SliverKnight
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
High detail stone wall with minor cracks and specks.
Source Projecteightyfive
Three shades of gray makes this pattern look like a small carbon fiber surface. Great readability even for small fonts.
Source Atle Mo
Run a restaurant blog? Here you go. Done.
Source Andrijana Jarnjak
Zero CC tileable Crackled Cement (streaks) texture, photographed and made by me. CC0
Source Sojan Janso
A huge one at 800x600px. Made from a photo I took going home after work.
Source Atle Mo
More Japanese-inspired patterns, Gold Scales this time.
Source Josh Green
A bit like smudged paint or some sort of steel, here is scribble light.
Source Tegan Male
It almost looks a bit blurry, but then again, so are fishes.
Source Petr Šulc
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
One of the few full-color patterns here, but this one was just too good to pass up.
Source Alexey Usoltsev
I guess this one is inspired by an office. A dark office.
Source Andrés Rigo.
From a drawing in 'In an Enchanted Island', William Mallock, 1892.
Source Firkin