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
Light gray grunge wall with a nice texture overlay.
Source Adam Anlauf
Utilising some flowers from Almeidah. To get the unit tile, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Looks like an old rug or a computer chip.
Source Patutin Sergey
I love cream! 50x50px and lovely in all the good ways.
Source Thomas Myrman
It was called Navy Blue, but I made it dark. You know, the way I like it.
Source Ethan Hamilton
A seamless pattern based on a tile that can be achieved by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Sort of reminds me of those old house wallpapers.
Source Tish
Did anyone say The Hoff? This pattern is in no way related to Baywatch.
Source Josh Green
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
An interesting dark spotted pattern at an angle.
Source Hendrik Lammers
A free seamless background pattern for use on websites.
Source V. Hartikainen
This texture looks like old leather. It should look great as a background on web pages.
Source V. Hartikainen
Prismatic Groovy Concentric Background 2
Source GDJ
Prismatic Abstract Geometric Background 4 No Black
Source GDJ
A background formed from an image of an old tile on the New York Metropolitan Museum of Art website. To get the base tile, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Actually remixed from a pattern on Pixabay. But then noticed a very similar one on Openclipart.org uploaded by btj51q2.
Source Firkin
Prismatic Geometric Tessellation Pattern 4 No Background
Source GDJ
A simple but elegant classic. Every collection needs one of these.
Source Christopher Burton