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
White little knobs, coming in at 10x10px. Sweet!
Source Amos
Formed by distorting the inside front cover of 'Diversæ insectarum volatilium : icones ad vivum accuratissmè depictæ per celeberrimum pictorem', Jacob Hoefnagel, 1630.
Source Firkin
One more brick pattern. A bit more depth to this one.
Source Benjamin Ward
Prismatic Hypnotic Pattern 2 No Background
Source GDJ
From a drawing in 'At home', J. Sowerby, J. Crane and T. Frederick, 1881.
Source Firkin
A floral background formed from numerous clones of flower 117.
Source Firkin
A beautiful dark wood pattern, superbly tiled.
Source Omar Alvarado
Not the most creative name, but it’s a good all-purpose light background.
Source Dmitry
To get the tile this is based on, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
No, not the band but the pattern. Simple squares in gray tones, of course.
Source Atle Mo
Prismatic Curved Diamond Pattern 4 No Background
Source GDJ
The classic notebook paper with horizontal stripes.
Source Are Sundnes
All good things come in threes, so I give you the third in my little concrete wall series.
Source Atle Mo
A seamless pattern the unit cell for which can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
Zero CC tileable hard cover cells, skin like, book texture. 4K, Scanned and made by me CC0
Source Sojan Janso