This beige background pattern resembles a concrete wall with engravings or something similar to it.
Source V. Hartikainen
Remixed from a raster on Pixabay, that was uploaded by ArtsyBee.
Source Firkin
This background pattern contains a seamless texture of bark. It's not very realistic, but I think it looks quite nice.
Source V. Hartikainen
The image is a seamless pattern of a fishnet.
Source Yamachem
Prismatic Curved Diamond Pattern 3 No Background
Source GDJ
Remixed from a drawing in 'Maidenhood; or, the Verge of the Stream', Laura Jewry, 1876.
Source Firkin
Seamless pattern the tile for which can be had by using shift-alt-I on the selected rectangle in Inkscape.
Source Firkin
Three shades of gray makes this pattern look like a small carbon fiber surface. Great readability even for small fonts.
Source Atle Mo
The basic shapes never get old. Simple triangle pattern.
Source Atle Mo
The name is totally random, but hey, it sounds good.
Source Atle Mo
Abstract Tiled Background Extended 6
Source GDJ
These dots are already worn for you, so you don’t have to.
Source Matt McDaniel
Simple gray checkered lines, in light tones.
Source Radosław Rzepecki
I took the liberty of using Dmitry’s pattern and made a version without perforation.
Source Atle Mo
This was formed by distorting an image of a background on Pixabay.
Source Firkin
Dark Tile-able Grunge Texture. I think this texture can be classified as grunge. It's free and seamless, as always.
Source V. Hartikainen
The image is a design of blue glass.How about using it as background image?
Source Yamachem
I skipped number 3, because it wasn’t all that great. Sorry.
Source Dima Shiper
White fabric looking texture with some nice random wave features.
Source Hendrik Lammers
Utilising a bird from s-light and some flowers from Almeidah. To get the unit tile, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Prismatic Floral Pattern 3 Variation 3 No Background
Source GDJ