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
This background pattern looks like bamboo to me. Feel free to download it for your website (for your blog perhaps?).
Source V. Hartikainen
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
This one is amazing, truly original. Go use it!
Source Viahorizon
Some more diagonal lines and noise, because you know you want it.
Source Atle Mo
Sharp but soft triangles in light shades of gray.
Source Pixeden
Number 3 in a series of 5 beautiful patterns. Can be found in colors on the submitter’s website.
Source Janos Koos
A black tile-able background with paper-like texture.
Source V. Hartikainen
Dark wooden pattern, given the subtle treatment. based on texture from Cloaks.
This one is so simple, yet so good. And you know it. Has to be in the collection.
Source Gluszczenko
Derived from a corner decoration itself found as a jpg on Pixabay.
Source Firkin