The basic shapes never get old. Simple triangle pattern.
Source Atle Mo
Prismatic Polka Dots 3 No Background
Source GDJ
Prismatic Groovy Concentric Background
Source GDJ
Lovely pattern with some good-looking non-random noise lines.
Source Zucx
A heavy dark gray base, some subtle noise and a 45-degree grid makes this look like a pattern with a tactile feel to it.
Source Atle Mo
From a drawing in 'Hyde Park from Domesday-Book to date', John Ashton, 1896.
Source Firkin
Fix and cc0 to get the tile this is based on.
Source SliverKnight
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
A bit strange this one, but nice at the same time.
Source Diogo Silva
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 'Line and form', Walter Crane, 1914.
Source Firkin
From a drawing in 'Less Black than we're painted', James Payn, 1884.
Source Firkin
The name is totally random, but hey, it sounds good.
Source Atle Mo
Geometric triangles seem to be quite hot these days.
Source Pixeden
Oh yes, it happened! A pattern in full color.
Source Atle Mo
To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i
Source Firkin
Everyone loves a diamond, right? Make your site sparkle.
Source AJ Troxell
From a design found in 'History of the Virginia Company of London; with letters to and from the first Colony, never before printed', Edward Neill, 1869.
Source Firkin
Derived from an image that was uploaded to Pixabay by starchim01
Source Firkin
A free web background image with a seamless concrete-like texture and an Indian-red color.
Source V. Hartikainen
You could get a bit dizzy from this one, but it might come in handy.
Source Dertig Media
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett