Seamless pattern formed from a tile that can be had by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
Prismatic Geometric Tessellation Pattern 3 No Background
Source GDJ
Vector version of a png that was uploaded to Pixabay by pencilparker
Source Firkin
A free pink background pattern.
Source V. Hartikainen
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
Light square grid pattern, great for a “DIY projects” sort of website, maybe?
Source Rafael Almeida
Same as gray sand but lighter. A sandy pattern with small light dots, and some angled strokes.
Source Atle Mo
A seamless pattern formed from miutopia's cakes on a tablecloth.
Source Firkin
If you like it a bit trippy, this wave pattern might be for you.
Source Ian Soper
A slightly grainy paper pattern with small horizontal and vertical strokes.
Source Atle Mo
Prismatic Abstract Geometric Background 5 No Black
Source GDJ
A textured orange background pattern with vertical stripes.
Source V. Hartikainen
From a drawing of the coat of arms of the Ottoman Empire on Wikimedia.
Source Firkin
Abstract Ellipses Background Grayscale
Source GDJ
Number five from the same submitter, makes my job easy.
Source Dima Shiper
To get the tile this is based on select the rectangle in Inkscape and use shift-alt-i
Source Firkin
Remixed from a raster on Pixabay, that was uploaded by ArtsyBee.
Source Firkin
A seamless pattern with green and yellow diagonal lines on top of a white dotted background.
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
A dark brown fabric-like background texture with seamless pattern of winding stripes.
Source V. Hartikainen
From a drawing in 'Resa i Afrika, genom Angola, Ovampo och Damaraland', P. Moller, 1899.
Source Firkin
Prismatic Abstract Geometric Background 4 No Black
Source GDJ
Prismatic Polyskelion Pattern No Background
Source GDJ
A classic dark tile for a bit of vintage darkness.
Source Listvetra