To get the tile this is based on, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
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
Dark pattern with some nice diagonal stitched lines crossing over.
Source Ashton
Nicely crafted paper pattern, although a bit on the large side (500x593px).
Source Blaq Annabiosis
A dark metal plate with an embossed grid pattern and a bit of rust. Here's a dark metal plate texture for use as a tiled background on web pages.
Source V. Hartikainen
A grid of squares with green colours. Since the colours are randomly distributed it is automatically seamless.
Source Firkin
Prismatic Geometric Pattern Variation 2 With Background
Source GDJ
Zero CC tileable seed texture, edited by me to be seamless from a Pixabay image. CC0
Source Sojan Janso
Embossed lines and squares with subtle highlights.
Source Alex Parker
This was formed by distorting an image of a background on Pixabay.
Source Firkin
By popular request, an outline version of the pentagon pattern.
Source Atle Mo
Used in small doses, this could be a nice subtle pattern. Used on a large surface, it’s dirty!
Source Paul Reulat
A bit strange this one, but nice at the same time.
Source Diogo Silva
Remixed from a drawing in 'Works. Popular edition', John Ruskin, 1886.
Source Firkin
Prismatic Groovy Concentric Background 2
Source GDJ
Dare I call this a «flat pattern»? Probably not.
Source Dax Kieran
Remixed from a raster on Pixabay, that was uploaded by ArtsyBee.
Source Firkin
Washi (和紙?) is a type of paper made in Japan. Here’s the pattern for you!
Source Carolynne
Here's a subtle marble-like background for use on websites.
Source V. Hartikainen
Prismatic Abstract Background Design No Black
Source GDJ
Inspired by an image that was uploaded to Pixabay by geralt
Source Firkin
The rectangular tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
Number 3 in a series of 5 beautiful patterns. Can be found in colors on the submitter’s website.
Source Janos Koos