A seamless pattern formed from a square tile. The tile can be retrieved by selecting the rectangle in Inkscape and using shift-alt-I. Version with black background.
Source Firkin
Zero CC tileable bark texture, photographed and made by me. CC0
Source Sojan Janso
A heavy hitter at 400x400px, but lovely still.
Source Breezi
Tiny little flowers growing on your screen. Nice, huh?
Source Themes Tube
Colour version that is close to the original drawing uploaded to Pixabay by pencilparker.
Source Firkin
A smooth mid-tone gray, or low contrast if you will, linen pattern.
Source Jordan Pittman
Prismatic Groovy Concentric Background
Source GDJ
Turn your site into a dragon with this great scale pattern.
Source Alex Parker
Tile available in Inkscape using shift-alt-i on the selected rectangle
Source Firkin
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
From a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Love the style on this one, very fresh. Diagonal diamond pattern. Get it?
Source INS
Classic vertical lines, in all its subtlety.
Source Cody L
Here's a camo print with more tan and less green, such as might be used in a desert scenario. This is tileable, so it can be used as a wallpaper or background.
Source Eady
There are many carbon patterns, but this one is tiny.
Source Designova
Prismatic Curved Diamond Pattern 6 No Background
Source GDJ
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
All good things come in threes, so I give you the third in my little concrete wall series.
Source Atle Mo
Seamless pattern formed from a tile that can be extracted by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
Dark wooden pattern, given the subtle treatment. based on texture from Cloaks.
No relation to the band, but damn it’s subtle!
Source Thomas Myrman
Formed by distorting a JPG from PublicDomainPictures
Source Firkin
A seamless pattern the starting point for which was a 'rainbow twist' texture in Paint.net.
Source Firkin