The classic 45-degree diagonal line pattern, done right.
Source Jorick van Hees
Alternative colour scheme. 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
From a drawing in 'Resa i Afrika, genom Angola, Ovampo och Damaraland', P. Moller, 1899.
Source Firkin
Formed by distorting a JPG from PublicDomainPictures
Source Firkin
Prismatic Groovy Concentric Background 5
Source GDJ
Inspired by a 1930s wallpaper pattern I saw on TV.
Source Firkin
Original seamless pattern with an Inkscape filter.
Source Firkin
Alternative colour scheme for the original floral pattern.
Source Firkin
Sharp pixel pattern, just like the good old days.
Source Paridhi
A beautiful dark padded pattern, like an old classic sofa.
Source Chris Baldie
Thin lines, noise and texture creates this crisp dark denim pattern.
Source Marco Slooten
The name is totally random, but hey, it sounds good.
Source Atle Mo
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
The first pattern on here using opacity. Try it on a site with a colored background, or even using mixed colors.
Source Nathan Spady
A dark brown fabric-like background texture with seamless pattern of winding stripes.
Source V. Hartikainen
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Prismatic Triangular Background Design Mark II 5
Source GDJ
Adapted from an image that was uploaded to Pixabay by Anerma.
Source Firkin
Prismatic Groovy Concentric Background 4
Source GDJ
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Remixed from a PNG that was uploaded to Pixabay by gingertea
Source Firkin