This background pattern looks like bamboo to me. Feel free to download it for your website (for your blog perhaps?).
Source V. Hartikainen
Recreated from a pattern found in 'Az Osztrák-Magyar Monarchia irásban és képben', 1882. To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
A seamless pattern the starting point for which was a 'rainbow twist' texture in Paint.net.
Source Firkin
Medium gray fabric pattern with 45-degree lines going across.
Source Atle Mo
Dark Tile-able Grunge Texture. I think this texture can be classified as grunge. It's free and seamless, as always.
Source V. Hartikainen
To get the tile this is based on, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
A beautiful dark padded pattern, like an old classic sofa.
Source Chris Baldie
Here's a brown background pattern with subtle stripes. I hope you'll like the color. If not, feel free to change it using an image editor, if you know how of course. Personally, I'm using GIMP to create these backgrounds.
Source V. Hartikainen
Prismatic Triangular Background Design Mark II 5
Source GDJ
Formed from a tile based on a drawing from 'Viaggi d'un artista nell'America Meridionale', Guido Boggiani, 1895.
Source Firkin
A nice looking light gray background pattern with diagonal stripes.
Source V. Hartikainen
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Vertical lines with a bumpy, yet crisp, feel to it.
Source Raasa
Remixed from a raster on Pixabay that was uploaded by ArtsyBee.
Source Firkin
Light gray paper pattern with small traces of fiber and some dust.
Source Atle Mo
A free grid paper background pattern for using on web sites.
Source V. Hartikainen
Inspired by the B&O Play, I had to make this pattern.
Source Atle Mo
The name Paisley reminds me of an old British servant. That’s just me.
Source Swetha
Tiny little fibers making a soft and sweet look.
Source Badhon Ebrahim