Here's an yet another background for websites, with a seamless texture of wood planks this time.
Source V. Hartikainen
Dark Tile-able Grunge Texture. I think this texture can be classified as grunge. It's free and seamless, as always.
Source V. Hartikainen
Dead simple but beautiful horizontal line pattern.
Source Fabian Schultz
Prismatic Groovy Concentric Background 5
Source GDJ
Remixed from a drawing in 'Works. Popular edition', John Ruskin, 1886.
Source Firkin
Abstract Ellipses Background Grayscale
Source GDJ
This ladies and gentlemen, is texturetastic! Love it.
Source Adam Pickering
The name Paisley reminds me of an old British servant. That’s just me.
Source Swetha
The image depicts a seamless pattern of a Japanese family crest called "chidori" in Japanese .A chidori in Japanese means a plover in English.
Source Yamachem
Drawn in Paint.net and vectorised in Vector Magic
Source Firkin
Semi-light fabric pattern made out of random pixels in shades of gray.
Source Atle Mo
This texture looks like old leather. It should look great as a background on web pages.
Source V. Hartikainen
Light and tiny, just the way you like it.
Source Rohit Arun Rao
A smooth mid-tone gray, or low contrast if you will, linen pattern.
Source Jordan Pittman
Abstract Ellipses Background Grayscale
Source GDJ
Brushed aluminum, in a bright gray version. Lovely 2X as well.
Source Andre Schouten
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
This is a semi-dark pattern, sort of linen-y.
Source Sagive SEO
Remixed from a drawing that was uploaded to Pixabay by captenpub.
Source Firkin
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
This is the remix of "Colorful Floral Pattern Background 3" uploaded by "GDJ". Thanks.
Source Yamachem
A pattern derived from repeating unit cells each derived from part of a fractal rendering in paint.net.
Source Firkin
The original enhanced with some gradients.
Source Firkin