Remixed from a design seen in 'Burghley. The Life of William Cecil', William Charlton, 1857.
Source Firkin
A seamless gray background texture suitable for use on websites. To me, it has the look of stone. Feel free to modify it to meet your needs (by making it a bit lighter or darker, for example).
Source V. Hartikainen
Submitted by DomainsInfo – wtf, right? But hey, a free pattern.
Source DomainsInfo
One can never have too few rice paper patterns, so here is one more.
Source Atle Mo
Super simple but very nice indeed. Gray with vertical stripes.
Source Merrin Macleod
Used the 6th circle pattern designed by Viscious-Speed to create a print that can be used for card making or scrapbooking. Save as a PDF file for the best printing option.
Source Lovinglf
Tile available in Inkscape using shift-alt-i on the selected rectangle
Source Firkin
Just like the black maze, only in light gray. Duh.
Source Peax
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
A bit strange this one, but nice at the same time.
Source Diogo Silva
A smooth mid-tone gray, or low contrast if you will, linen pattern.
Source Jordan Pittman
Retro Circles Background 8 No Black
Source GDJ
A beautiful dark wood pattern, superbly tiled.
Source Omar Alvarado
The image depicts a seamless pattern of a Japanese family crest called "chidori" in Japanese .A chidori in Japanese means a plover in English.
Source Yamachem
8 by 8 pixels, and just what the title says.
Source pixilated
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
Dare I call this a «flat pattern»? Probably not.
Source Dax Kieran
ZeroCC tileable mossy (lichen) stone texture, edited from pixabay. CC0
Source Sojan Janso
The name alone is awesome, but so is this sweet dark pattern.
Source Federica Pelzel
Prismatic Geometric Pattern Background 2
Source GDJ
Light and tiny, just the way you like it.
Source Rohit Arun Rao