Use shift+alt+i on the selected rectangle in Inkscape to get the tile this is based on
Source Firkin
Remixed from a drawing in 'Paul's Sister', Frances Peard, 1889.
Source Firkin
A seamless pattern formed from cross 4. To get the original tile select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
From a drawing in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.
Source Firkin
Derived from a corner decoration itself found as a jpg on Pixabay.
Source Firkin
To get the tile this is based on, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
A free seamless background image with a texture of dark red "canvas". It should look very nice on web sites.
Source V. Hartikainen
A seamless tessellation pattern. To get the tile this is formed from, select the pattern in Inkscape and use shift+alt+i.
Source Firkin
The green fibers pattern will work very well in grayscale as well.
Source Matteo Di Capua
Dark Tile-able Grunge Texture. I think this texture can be classified as grunge. It's free and seamless, as always.
Source V. Hartikainen
Prismatic Abstract Geometric Background 5 No Black
Source GDJ
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
Dark, square, clean and tidy. What more can you ask for?
Source Jaromír Kavan
The image depicts a seamless pattern made using a bird's face.
Source Yamachem
Inspired by an image that was uploaded to Pixabay by geralt
Source Firkin
From a drawing in 'Worsborough; its historical associations and rural attractions', Joseph Wilkinson, 1879.
Source Firkin
A pale olive green background with a seamless texture.
Source V. Hartikainen
Same classic 45-degree pattern, dark version.
Source Luke McDonald
A seamless light gray paper texture with horizontal double lines.
Source V. Hartikainen
Dark and hard, just the way we like it. Embossed triangles makes a nice pattern.
Source Ivan Ginev
Dark, crisp and subtle. Tiny black lines on top of some noise.
Source Wilmotte Bastien
Light gray grunge wall with a nice texture overlay.
Source Adam Anlauf