Here I have tried to create something that would look like maple wood. Not sure how well it's turned out, but at least it looks like wood.
Source V. Hartikainen
Prismatic Rounded Squares Grid 4 No Background
Source GDJ
Prismatic Triangular Background Design Mark II 5
Source GDJ
Background formed from the original with an emboss effect.
Source Firkin
The act or state of corrugating or of being corrugated, a wrinkle; fold; furrow; ridge.
Source Anna Litvinuk
Zero CC tileable cork floor, photographed and made by me. CC0
Source Sojan Janso
This reminds me of Game Cube. A nice light 3D cube pattern.
Source Sander Ottens
A free seamless background texture of "timber wall" (colored in dark brown).
Source V. Hartikainen
Abstract Ellipses Background Grayscale
Source GDJ
A seamless pattern created from a square tile. To get the tile, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
That’s what it is, a dark dot. Or sort of carbon looking.
Source Tsvetelin Nikolov
Floral patterns will never go out of style, so enjoy this one.
Source Lasma
Inspired by a pattern seen on a public domain image of a very old tile. To get the unit cell, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Plywood Web Background background image for use in web design.
Source V. Hartikainen
A seamless pattern formed from a square tile based on a jpg on Pixabay. The tile can be retrieved by selecting the rectangle in Inkscape and using shift-alt-I.
Source Firkin
From a drawing in 'Resa i Afrika, genom Angola, Ovampo och Damaraland', P. Moller, 1899.
Source Firkin
Seamless Green Tile Background
Source V. Hartikainen
Derived from an image that was uploaded to Pixabay by Kaz
Source Firkin
A heavy hitter at 400x400px, but lovely still.
Source Breezi
Remixed from a drawing in 'Canadian forest industries July-December', 1915
Source Firkin
Simple gray checkered lines, in light tones.
Source Radosław Rzepecki