A seamless pattern formed from a sports car on clker.com. To get the tile, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Not even 1kb, but very stylish. Gray thin lines.
Source Struck Axiom
Floral patterns will never go out of style, so enjoy this one.
Source Lasma
Just like the black maze, only in light gray. Duh.
Source Peax
Remixed from a drawing in 'Hungary. A guide book. By several authors', 1890.
Source Firkin
Remixed from an image that was uploaded to Pixabay by Pixeline
Source Firkin
A free web background image with a seamless concrete-like texture and an Indian-red color.
Source V. Hartikainen
From a drawing in 'Les Chroniqueurs de l'Histoire de France depuis les origines jusqu'au XVIe siècle', Henriette Witt, 1884.
Source Firkin
Vector version of a png that was uploaded to Pixabay by pencilparker
Source Firkin
Made by distorting a simple pattern using the 'sin waves' plugin for Paint.net and vectorising in Vector Magic
Source Firkin
Drawn in Paint.net and vectorised in Vector Magic
Source Firkin
Number five from the same submitter, makes my job easy.
Source Dima Shiper
Zero CC tileable wood texture, made by me procedurally in Neo Texture Edit.
Source Sojan Janso
Sort of like the Photoshop transparent background, but better!
Source Alex Parker
Prismatic Snowflakes Pattern 2 No Background
Source GDJ
Sweet and subtle white plaster with hints of noise and grunge.
Source Phil Maurer
Sort of like the back of a wooden board. Light, subtle, and stylish, just the way we like it!
Source Nikolalek
Based on several public domain drawings on Wikimedia Commons. This was formed from a rectangular tile. The tile can be accessed in Inkscape by selecting the rectangle and using shift-alt-i
Source Firkin
Derived from a drawing in 'The Murmur of the Shells', Samuel Cowen, 1879.
Source Firkin
This is so subtle I hope you can see it! Tweak at will.
Source Alexandre Naud
That’s what it is, a dark dot. Or sort of carbon looking.
Source Tsvetelin Nikolov
The image is a seamless pattern of a fishnet.
Source Yamachem
Derived from a drawing in 'Elfrica. An historical romance of the twelfth century', Charlotte Boger, 1885
Source Firkin
Super dark, crisp and detailed. And a Kill Bill reference.
Source Badhon Ebrahim
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