From a drawing in 'In an Enchanted Island', William Mallock, 1892.
Source Firkin
A topographic map like this has actually been requested a few times, so here you go!
Source Sam Feyaerts
This is the remix of an Openclipart clipart called "Maze" uploaded by "any_ono_mous".Thanks.This is a seamless pattern of a maze.
Source Yamachem
The image depicts a shell seamless pattern.I used an OCAL clipart called "Shell" uploaded by "jgm104".Thanks.
Source Yamachem
Inspired by a 1930s wallpaper pattern I saw on TV.
Source Firkin
This is so subtle I hope you can see it! Tweak at will.
Source Alexandre Naud
Simple wide squares with a small indent. Fits all.
Source Petr Šulc.
Little x’es, noise and all the stuff you like. Dark like a Monday, with a hint of blue.
Source Tom McArdle
Derived from a drawing in 'Elfrica. An historical romance of the twelfth century', Charlotte Boger, 1885
Source Firkin
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Because I love dark patterns, here is Brushed Alum in a dark coating.
Source Tim Ward
It almost looks a bit blurry, but then again, so are fishes.
Source Petr Šulc
Dark squares with some virus-looking dots in the grid.
Source Hugo Loning
Prismatic Hypnotic Pattern No Background
Source GDJ
A seamless pattern based on a square tile that can be retrieved in Inkscape by selecting the rectangle and using shift-alt-i.
Source Firkin
A seamless pattern the unit cell for which can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
This makes me wanna shoot some pool! Sweet green pool table pattern.
Source Caveman
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
Tile-able Dark Brown Wood Background. Feel free to use it as a background image in your designs or somewhere on the web. By the way, the color seems to be close to Coffee Brown.
Source V. Hartikainen
It has waves, so make sure you don’t get sea sickness.
Source CoolPatterns