From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Might not be super subtle, but quite original in its form.
Source Alex Smith
Zero CC tileable ground (#2) cracked, crackled texture, made by me. CC0
Source Sojan Janso
A background pattern inspired by designs seen in 'Burghley. The Life of William Cecil', William Charlton, 1857.
Source Firkin
Prismatic Snowflakes Pattern No Background
Source GDJ
An attempt for cleaning up the original image in a few steps.
Source Lazur URH
Fabric-ish patterns are close to my heart. French Stucco to the rescue.
Source Christopher Buecheler
Luxury pattern, looking like it came right out of Paris.
Source Daniel Beaton
Kaleidoscope Prismatic Abstract No Background
Source GDJ
Abstract Geometric Monochrome Pattern Prismatic No Background
Source GDJ
A seamless pattern made from the gold Penrose triangle by GDJ and the two remixes
Source Firkin
Same as Silver Scales, but in black. Turn your site into a dragon with this great scale pattern.
Source Alex Parker
Seamless pattern the tile for which can be had by using shift-alt-I on the selected rectangle in Inkscape.
Source Firkin
A seamless pattern the starting point for which was a 'light rays' rendering in Paint.net.
Source Firkin
Here's a quite bright pink background pattern for use on websites. It doesn't look like a real fur, but it definitely resembles one.
Source V. Hartikainen
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
This is lovely, just the right amount of subtle noise, lines and textures.
Source Richard Tabor
From a drawing in 'Gately's World's Progress', Charles Beale, 1886.
Source Firkin
A repeating background with wood/straw like texture.
Source V. Hartikainen
One more from Badhon, sharp horizontal lines making an embossed paper feeling.
Source Badhon Ebrahim
Seamless pattern formed from a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
Derived from a PNG that was uploaded to Pixabay by nutkitten
Source Firkin
It’s like Shine Dotted’s sister, only rotated 45 degrees.
Source mediumidee
Original seamless pattern with an Inkscape filter.
Source Firkin
Prismatic Groovy Concentric Background 5 No Black
Source GDJ