Could remind you a bit of those squares in Super Mario Bros, yeh?
Source Jeff Wall
Snap! It’s a pattern, and it’s not grayscale! Of course you can always change the color in Photoshop.
Source Atle Mo
Geometric triangles seem to be quite hot these days.
Source Pixeden
A green background pattern with warped vertical stripes and a grunge look.
Source V. Hartikainen
Prismatic Geometric Pattern Variation 2 With Background
Source GDJ
More in the paper realm, this time with fibers.
Source Jorge Fuentes
The first pattern on here using opacity. Try it on a site with a colored background, or even using mixed colors.
Source Nathan Spady
A pale olive green background with a seamless texture.
Source V. Hartikainen
Remixed from a drawing in 'The March of Loyalty', Letitia MacClintock, 1884.
Source Firkin
Sounds French. Some 3D square diagonals, that’s all you need to know.
Source Graphiste
Alternative colour scheme. Not a pattern for fabrics, but one produced from a jpg of a stack of fabric items that was posted on Pixabay. The tile that this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
To get the tile this is based on, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
From a drawing in 'Studies for Stories', Jean Ingelow, 1864.
Source Firkin
Used a cherry by doctormo to make this seamless pattern
Source Firkin
In the spirit of WWDC 2011, here is a dark iOS inspired linen pattern.
Source Atle Mo
Basket Fibers, Basket Texture, Braid Background style CC0 texture.
Source 1A-Photoshop
The tile this is based on can be retrieved by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
From a drawing in 'Two Women in the Klondike', Mary Hitchcock, 1899.
Source Firkin
Just what the name says, paper fibers. Always good to have.
Source Heliodor jalba
Zero CC tileable hard cover red book, scanned and made by me. CC0
Source Sojan Janso