The green fibers pattern will work very well in grayscale as well.
Source Matteo Di Capua
From a drawing in 'Les Chroniqueurs de l'Histoire de France depuis les origines jusqu'au XVIe siècle', Henriette Witt, 1884.
Source Firkin
Simple gray checkered lines, in light tones.
Source Radosław Rzepecki
The file was named striped lens, but hey – Translucent Fibres works too.
Source Angelica
This light background pattern has a texture of "frozen" surface with diagonal stripes. Here's an yet another addition to the collection of free website backgrounds.
Source V. Hartikainen
The image depicts polka dot seamless pattern.
Source Yamachem
This could be a hippy vintage wallpaper.
Source Tileable Patterns
We have some linen patterns here, but none that are stressed. Until now.
Source Jordan Pittman
Formed from a tile based on a drawing from 'Viaggi d'un artista nell'America Meridionale', Guido Boggiani, 1895.
Source Firkin
Remixed from a drawing in 'Jezebel's Daughter', Wilkie Collins 1880
Source Firkin
Prismatic Curved Diamond Pattern 4 No Background
Source GDJ
This makes me wanna shoot some pool! Sweet green pool table pattern.
Source Caveman
The tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
A mid-tone gray pattern with some cement looking texture.
Source Hendrik Lammers
Number five from the same submitter, makes my job easy.
Source Dima Shiper
Geometric lines are always hot, and this pattern is no exception.
Source Listvetra
A seamless pattern formed from a square tile. To get the tile, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Prismatic Isometric Cube Wireframe Pattern No Background
Source GDJ
Light honeycomb pattern made up of the classic hexagon shape.
Source Federica Pelzel
Prismatic Hypnotic Pattern 2 No Background
Source GDJ
In the spirit of WWDC 2011, here is a dark iOS inspired linen pattern.
Source Atle Mo
Thin lines, noise and texture creates this crisp dark denim pattern.
Source Marco Slooten
Prismatic Geometric Pattern Variation 2 With Background
Source GDJ