Based on several public domain drawings on Wikimedia Commons. This was formed from a rectangular tile. The tile can be accessed in Inkscape by selecting the rectangle and using shift-alt-i
Source Firkin
A slightly more textured pattern, medium gray. A bit like a potato sack?
Source Bilal Ketab
Remixed from a drawing in 'A Child of the Age', Francis Adams, 1894.
Source Firkin
After 1 comes 2, same but different. You get the idea.
Source Hendrik Lammers
Seamless pattern formed from a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
This is a hot one. Small, sharp and unique.
Source GraphicsWall
A seamless pattern based on a rectangular tile that can be retrieved in Inkscape by selecting the rectangle and using shift-alt-i.
Source Firkin
If you want png files of this u can download them here : viscious-speed.deviantart.com/gallery/27635117
Source Viscious-Speed
Tweed is back in style – you heard it here first. Also, the @2X version here is great!
Source Simon Leo
Formed by distorting a JPG from PublicDomainPictures
Source Firkin
This background has abstract texture with some similarities to wood.
Source V. Hartikainen
This is a semi-dark pattern, sort of linen-y.
Source Sagive SEO
Not so subtle. These tileable wood patterns are very useful.
Source Elemis
This is a grid, only it’s noisy. You know. Reminds you of those printed grids you draw on.
Source Vectorpile
A rusty grunge background for websites. Feel free to use it in your site's theme.
Source V. Hartikainen
Retro Circles Background 7 No Black
Source GDJ
Remixed from a drawing in 'Chambéry à la fin du XIVe siècle', Timoleon Chapperon, 1863.
Source Firkin
A pattern formed from a squared tile. The tile can be accessed in Inkscape by selecting the rectangle and using shift-alt-i.
Source Firkin
Prismatic Abstract Background Design
Source GDJ
Seamless Prismatic Geometric Pattern With Background
Source GDJ
A seamless pattern the starting point for which was a 'rainbow twist' texture in Paint.net.
Source Firkin
Alternative colour scheme for the original floral pattern.
Source Firkin
Looks like an old rug or a computer chip.
Source Patutin Sergey
Prismatic Groovy Concentric Background 4
Source GDJ