A bit like some carbon, or knitted netting if you will.
Source Anna Litvinuk
After 1 comes 2, same but different. You get the idea.
Source Hendrik Lammers
A free seamless background with pink spots.
Source V. Hartikainen
I guess this one is inspired by an office. A dark office.
Source Andrés Rigo.
Prismatic Geometric Pattern Variation 2 With Background
Source GDJ
A cute x, if you need that sort of thing.
Source Juan Scrocchi
Another fairly simple design drawn in Paint.net and vectorized in Inkscape.
Source Firkin
Prismatic Curved Diamond Pattern 2 No Background
Source GDJ
From a drawing in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.
Source Firkin
Submitted in a cream color, but you know how I like it.
Source Devin Holmes
The following repeating website background is colored in a blue gray color and resembles a concrete wall or something similar to it.
Source V. Hartikainen
Seamless pattern formed from a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
A background pattern with wavy green vertical stripes. This one has green stripes on a white background. Download if you like it.
Source V. Hartikainen
Seamless Green Tile Background
Source V. Hartikainen
Seamless pattern the tile for which can be had by using shift-alt-I on the selected rectangle in Inkscape.
Source Firkin
Prismatic Abstract Line Art Pattern 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
Prismatic Snowflakes Pattern 3 No Background
Source GDJ
Medium gray pattern with small strokes to give a weave effect.
Source Catherine
It’s a hole, in a pattern. On your website. Dig it!
Source Josh Green