Seamless pattern the basic tile for which can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Derived from an image that was uploaded to Pixabay by darkmoon1968
Source Firkin
There are many carbon patterns, but this one is tiny.
Source Designova
Sharp pixel pattern looking like some sort of fabric.
Source Dmitry
A nice and simple white rotated tile pattern.
Source Another One
From a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
A nice one indeed, but I have a feeling we have it already? If you spot a copy, let me know on Twitter.
Source Graphiste
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Vector version of a png that was uploaded to Pixabay by pencilparker
Source Firkin
Gold Triangular Seamless Pattern No Background
Source GDJ
A topographic map like this has actually been requested a few times, so here you go!
Source Sam Feyaerts
Prismatic Hexagonalism Pattern No Background
Source GDJ
Farmer could be some sort of fabric pattern, with a hint of green.
Source Fabian Schultz
Recreated from a pattern found in 'Az Osztrák-Magyar Monarchia irásban és képben', 1882. To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
A seamless paper background texture colored in pale yellow. This seamless texture is ideal for those who need a yellow background image for their website. The texture resembles paper.
Source V. Hartikainen
From a drawing in 'In an Enchanted Island', William Mallock, 1892.
Source Firkin
This one needs to be used in small areas; you can see it repeat.
Source Luca
Wild Oliva or Oliva Wilde? Darker than the others, sort of a medium dark pattern.
Source Badhon Ebrahim
A huge one at 800x600px. Made from a photo I took going home after work.
Source Atle Mo
Here's a dark background pattern that contains a steel grid pattern as a texture. Use it as a website background or for other purposes. It's free!
Source V. Hartikainen
Just like your old suit, all striped and smooth.
Source Alex Berkowitz
Remixed from a drawing in 'Analecta Eboracensia', Thomas Widdrington, 1897.
Source Firkin