White fabric looking texture with some nice random wave features.
Source Hendrik Lammers
As the original image 's page size is too large for its image size, I remixed it.
Source Yamachem
Number 3 in a series of 5 beautiful patterns. Can be found in colors on the submitter’s website.
Source Janos Koos
Prismatic Abstract Geometric Background 2 No Black
Source GDJ
A pale yellow background pattern with vertical stripes. The stripes are partially faded. I think this background image turned out pretty well, especially those faded stripes.
Source V. Hartikainen
Prismatic Basic Pattern 2 No Background
Source GDJ
There are quite a few grid patterns, but this one is a super tiny grid with some dust for good measure.
Source Dominik Kiss
Turn your site into a dragon with this great scale pattern.
Source Alex Parker
From a drawing in 'Worsborough; its historical associations and rural attractions', Joseph Wilkinson, 1879.
Source Firkin
And some more testing, this time with Seamless Studio. It’s Robots FFS!
Source Seamless Studio
This reminds me of Game Cube. A nice light 3D cube pattern.
Source Sander Ottens
Prismatic Abstract Geometric Background 5
Source GDJ
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
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
Prismatic Groovy Concentric Background 2
Source GDJ
Used in small doses, this could be a nice subtle pattern. Used on a large surface, it’s dirty!
Source Paul Reulat
Floral patterns will never go out of style, so enjoy this one.
Source Lasma
From a drawing in 'Studies for Stories', Jean Ingelow, 1864.
Source Firkin
Prismatic Hypnotic Pattern 2 No Background
Source GDJ
A free green background pattern with a pattern of rhombuses on a seamless texture. Feel free to use it as a tiled background image on your web site.
Source V. Hartikainen