Here's a repeatable texture that resembles a light green concrete wall or something similar.
Source V. Hartikainen
A series of 5 patterns. That’s what the P stands for, if you didn’t guess it.
Source Dima Shiper
Black brick wall pattern. Brick your site up!
Source Alex Parker
Semi-light fabric pattern made out of random pixels in shades of gray.
Source Atle Mo
Formed from a tile based on a drawing from 'Viaggi d'un artista nell'America Meridionale', Guido Boggiani, 1895.
Source Firkin
A large (588x375px) sand-colored pattern for your ever-growing collection. Shrink at will.
Source Alex Tapein
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i
Source Firkin
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, crisp and subtle. Tiny black lines on top of some noise.
Source Wilmotte Bastien
Could remind you a bit of those squares in Super Mario Bros, yeh?
Source Jeff Wall
I have no idea what J Boo means by this name, but hey – it’s hot.
Source j Boo
A background pattern inspired by designs seen in 'Burghley. The Life of William Cecil', William Charlton, 1857.
Source Firkin