Black brick wall pattern. Brick your site up!
Source Alex Parker
A repeating graphic with ancient pattern. I came up with this name/title at last minute, so you may find that there is very little of ancientness in this pattern after all.
Source V. Hartikainen
Just the symbols of the signs of the zodiac distributed in a chequer board-like pattern
Source Firkin
A grid of squares with green colours. Since the colours are randomly distributed it is automatically seamless.
Source Firkin
More in the paper realm, this time with fibers.
Source Jorge Fuentes
Background Wall, Art Abstract, Blue Well & CC0 texture.
Source Ractapopulous
Number five from the same submitter, makes my job easy.
Source Dima Shiper
Not so subtle. These tileable wood patterns are very useful.
Source Elemis
This is a semi-dark pattern, sort of linen-y.
Source Sagive SEO
A hint of orange color, and some crossed and embossed lines.
Source Adam Anlauf
Background Wall, Art Abstract, Star Well & CC0 texture.
Source Ractapopulous
A seamless pattern based on a square tile that can be retrieved in Inkscape by selecting the rectangle and using shift-alt-i.
Source Firkin
Another fairly simple design drawn in Paint.net and vectorized in Inkscape.
Source Firkin
From a drawing in 'At home', J. Sowerby, J. Crane and T. Frederick, 1881.
Source Firkin
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
To get the tile this is based on, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Dark and hard, just the way we like it. Embossed triangles makes a nice pattern.
Source Ivan Ginev
A seamless pattern the unit cell for which can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
A chequerboard pattern with a fruit theme. The fruits are from a posting by inkscapeforum.it.
Source Firkin
If you want png files of this u can download them here : viscious-speed.deviantart.com/gallery/27635117
Source Viscious-Speed
You may use it as is, or modify it as you like.
Source V. Hartikainen
It was called Navy Blue, but I made it dark. You know, the way I like it.
Source Ethan Hamilton