A huge one at 800x600px. Made from a photo I took going home after work.
Source Atle Mo
Prismatic Geometric Pattern Variation 2 With Background
Source GDJ
Inspired by a 1930s wallpaper pattern I saw on TV.
Source Firkin
Smooth Polaroid pattern with a light blue tint.
Source Daniel Beaton
ZeroCC tileable stone texture, edited from pixabay. CC0
Source Sojan Janso
A dark metallic background with a pattern of stamped dots. Here's a dark "metallic" background pattern for you.
Source V. Hartikainen
To get the tile this is based on, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Not a pattern for fabrics, but one produced from a jpg of a stack of fabric items that was posted on Pixabay. The tile that this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Don’t look at this one too long if you’re high on something.
Source Luuk van Baars
Prismatic Geometric Tessellation Pattern 4 No Background
Source GDJ
Remixed from a drawing in 'Chambéry à la fin du XIVe siècle', Timoleon Chapperon, 1863.
Source Firkin
A dark pattern made out of 3×3 circles and a 1px shadow. This works well as a carbon texture or background.
Source Atle Mo
From a drawing in 'Les Chroniqueurs de l'Histoire de France depuis les origines jusqu'au XVIe siècle', Henriette Witt, 1884.
Source Firkin
If you need a green background for your blog/website, try this one. Remember that Green Striped Background is seamlessly tileable.
Source V. Hartikainen
Derived from an image that was uploaded to Pixabay by mdmelo.
Source Firkin
Seamless pattern formed from a tile that can be had by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
Geometric triangles seem to be quite hot these days.
Source Pixeden
Formed by heavily distorting part of a an image of a fish uploaded to Pixabay by GLady
Source Firkin
Found on the ground in french cafe in kunming, Yunnan, china
Source Rejon
From a drawing in 'An Old Maid's Love. A Dutch tale told in English', Maarten Maartens, 1891.
Source Firkin
Nicely crafted paper pattern, although a bit on the large side (500x593px).
Source Blaq Annabiosis
Did anyone say The Hoff? This pattern is in no way related to Baywatch.
Source Josh Green
This is the third pattern called Dark Denim, but hey, we all love them!
Source Brandon Jacoby
Very simple, very blu(e). Subtle and nice.
Source Seb Jachec
Black brick wall pattern. Brick your site up!
Source Alex Parker
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight