The rectangular tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
A seamless gray background texture suitable for use on websites. To me, it has the look of stone. Feel free to modify it to meet your needs (by making it a bit lighter or darker, for example).
Source V. Hartikainen
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Remixed from a raster on Pixabay, that was uploaded by ArtsyBee.
Source Firkin
Dead simple but beautiful horizontal line pattern.
Source Fabian Schultz
Formed by distorting the inside front cover of 'Diversæ insectarum volatilium : icones ad vivum accuratissmè depictæ per celeberrimum pictorem', Jacob Hoefnagel, 1630.
Source Firkin
You know you can’t get enough of these linen-fabric-y patterns.
Source James Basoo
A bit like smudged paint or some sort of steel, here is scribble light.
Source Tegan Male
The image depicts polka dot seamless pattern.
Source Yamachem
ZeroCC tileable moss texture, photographed and made by me. CC0
Source Sojan Janso
A seamless striped fabric-like texture colored in a dark reddish brown color.
Source V. Hartikainen
Not the most creative name, but it’s a good all-purpose light background.
Source Dmitry
Don’t look at this one too long if you’re high on something.
Source Luuk van Baars
Prismatic Groovy Concentric Background 3 No Black
Source GDJ
Number 3 in a series of 5 beautiful patterns. Can be found in colors on the submitter’s website.
Source Janos Koos
Remixed from a drawing in 'Paul's Sister', Frances Peard, 1889.
Source Firkin
From a drawing in 'Chambéry à la fin du XIVe siècle', Timoleon Chapperon, 1863.
Source Firkin
Remixed from a drawing in 'The Canadian horticulturist', 1892
Source Firkin
A dark one with geometric shapes and dotted lines.
Source Mohawk Studios
Geometric lines are always hot, and this pattern is no exception.
Source Listvetra
Sometimes you just need the simplest thing.
Source Fabricio
emixed from a JPG that was uploaded to Pixabay by Kyotime
Source Firkin
Sounds like something from World of Warcraft. Has to be good.
Source Tony Kinard
A light gray wall or floor (you decide) of concrete.
Source Atle Mo