This could be a hippy vintage wallpaper.
Source Tileable Patterns
A seamless pattern created from a square tile. To get the tile, select the pattern in Inkscape and use shift+alt+i.
Source Firkin
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
A slightly more textured pattern, medium gray. A bit like a potato sack?
Source Bilal Ketab
Sharp pixel pattern, just like the good old days.
Source Paridhi
The following free background pattern has glossy diagonal stripes as a texture to it, and it's colored in a light blue gray color. This background pattern is suitable for using in web design or any other graphic design projects. This applies to all background patterns here.
Source V. Hartikainen
Simple wide squares with a small indent. Fits all.
Source Petr Šulc.
Old China with a modern twist, take two.
Source Adam Charlts
The tile this is formed from can be retrieved in Inkscape by selecting the rectangle and using shift+alt+i
Source Firkin
This was formed by distorting an image of a background on Pixabay.
Source Firkin
Zero CC tileable Laminate wood texture, photographed and made by me. CC0
Source Sojan Janso
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
If you like it a bit trippy, this wave pattern might be for you.
Source Ian Soper
Just the symbols of the signs of the zodiac distributed in a chequer board-like pattern
Source Firkin
Medium gray pattern with small strokes to give a weave effect.
Source Catherine
emixed from a JPG that was uploaded to Pixabay by Kyotime
Source Firkin
Prismatic Curved Diamond Pattern 4 No Background
Source GDJ
Same as Silver Scales, but in black. Turn your site into a dragon with this great scale pattern.
Source Alex Parker
Background Wall, Art Abstract, Block Well & CC0 texture.
Source Ractapopulous