Dark squares with some virus-looking dots in the grid.
Source Hugo Loning
There are quite a few grid patterns, but this one is a super tiny grid with some dust for good measure.
Source Dominik Kiss
With a name like this, it has to be hot. Diagonal lines in light shades.
Source Isaac
One can never have too few rice paper patterns, so here is one more.
Source Atle Mo
The tile this fill pattern is based on can be had by using shift+alt+i on the rectangle.
Source Firkin
Luxury pattern, looking like it came right out of Paris.
Source Daniel Beaton
Same as gray sand but lighter. A sandy pattern with small light dots, and some angled strokes.
Source Atle Mo
With a name like this, it has to be hot. Diagonal lines in light shades.
Source Isaac
The image depicts a seamless pattern of a Japanese family crest called "chidori" in Japanese .A chidori in Japanese means a plover in English.
Source Yamachem
Remixed from a drawing that was uploaded to Pixabay by ractapopulous
Source Firkin
Abstract Geometric Monochrome Pattern Prismatic No Background
Source GDJ
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
A grayscale fabric pattern with vertical lines of stitch holes.
Source V. Hartikainen
A free tileable background colored in off-white (antique white) color.
Source V. Hartikainen
Here's a new background image for websites with a seamless pink texture. It should look beautiful with website themes where light pink background is needed. The background is seamless, therefore it should be used as a tiled background.
Source V. Hartikainen
Light gray paper pattern with small traces of fiber and some dust.
Source Atle Mo
Prismatic Isometric Cube Wireframe Pattern No Background
Source GDJ
A seamless pattern the unit cell for which can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Here's a bluish gray striped background pattern for use on web sites.
Source V. Hartikainen
Remixed from a drawing in 'Hungary. A guide book. By several authors', 1890.
Source Firkin
Prismatic Abstract Line Art Pattern Background
Source GDJ