To get the tile this is formed from select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Drawn in Paint.net and vectorised in Vector Magic.
Source Firkin
Prismatic Geometric Pattern Variation 2 With Background
Source GDJ
Formed by distorting a JPG from PublicDomainPictures
Source Firkin
Colorful Floral Background 3 No Black
Source GDJ
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
From a drawing in 'An Old Maid's Love. A Dutch tale told in English', Maarten Maartens, 1891.
Source Firkin
Just like your old suit, all striped and smooth.
Source Alex Berkowitz
Number five from the same submitter, makes my job easy.
Source Dima Shiper
Black & white version of a pattern that came out of playing with the 'light rays' plug-in for Paint.net
Source Firkin
One more brick pattern. A bit more depth to this one.
Source Benjamin Ward
A seamless pattern formed from a square tile. The tile can be retrieved by selecting the rectangle in Inkscape and using shift-alt-i
Source Firkin
Background formed from the original with an emboss effect
Source GDJ
Zero CC tillable hard cover red book with X shape marks. Scanned and made by me.
Source Sojan Janso
From a drawing in 'Studies for Stories', Jean Ingelow, 1864.
Source Firkin
A pattern drawn in Paint.net and vectorized in Inkscape.
Source Firkin
Prismatic Groovy Concentric Background 5 No Black
Source GDJ
A seamless design of flowers remixed from a jpg on Pixabay by Prawny.
Source Firkin
Prismatic Curved Diamond Pattern 6 No Background
Source GDJ
Pattern Background, Texture, Photoshop Structure style CC0 texture.
Source Darkmoon1968
From a drawing in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.
Source Firkin
On a large canvas you can see it tiling, but used on smaller areas, it’s beautiful.
Source Paul Phönixweiß
Zero CC tileable moss or lichen covered stone texture, edited from pixabay. CC0
Source Sojan Janso