Looks like a technical drawing board: small squares forming a nice grid.
Source We Are Pixel8
Don’t look at this one too long if you’re high on something.
Source Luuk van Baars
This is so subtle you need to bring your magnifier!
Source Carlos Valdez
This ladies and gentlemen, is texturetastic! Love it.
Source Adam Pickering
The image depicts a seamless pattern made using a bird's face.
Source Yamachem
Washi (和紙?) is a type of paper made in Japan. Here’s the pattern for you!
Source Carolynne
A very dark spotted twinkle pattern for your twinkle needs.
Source Badhon Ebrahim
Zero CC tileable ground (#2) cracked, crackled texture, made by me. CC0
Source Sojan Janso
Same as gray sand but lighter. A sandy pattern with small light dots, and some angled strokes.
Source Atle Mo
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
Seamless pattern the tile for which can be had by using shift-alt-I on the selected rectangle in Inkscape.
Source Firkin
I asked Gjermund if he could make a pattern for us – result!
Source Gjermund Gustavsen
The square tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
From a drawing in 'Two Women in the Klondike', Mary Hitchcock, 1899.
Source Firkin
This is lovely, just the right amount of subtle noise, lines and textures.
Source Richard Tabor
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
Remixed from a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
To get the tile this is based on select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
From a drawing in 'Uit de geschiedenis der Heilige Stede te Amsterdam', Yohannes Sterck, 1898.
Source Firkin
It’s like Shine Dotted’s sister, only rotated 45 degrees.
Source mediumidee