Some rectangles, a bit of dust and grunge, plus a hint of concrete.
Source Atle Mo
The tile this is formed from can be retrieved in Inkscape by selecting the rectangle and using shift+alt+i
Source Firkin
Tweed is back in style – you heard it here first. Also, the @2X version here is great!
Source Simon Leo
A seamless pattern the unit cell for which can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
Zero CC tileable ground cracked, crackled, texture, made by me.
Source Sojan Janso
Prismatic Curved Diamond Pattern 4 No Background
Source GDJ
A bit like some carbon, or knitted netting if you will.
Source Anna Litvinuk
It’s okay to be square! A nice light gray pattern with random squares.
Source Waseem Dahman
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
From a drawing in 'Les Chroniqueurs de l'Histoire de France depuis les origines jusqu'au XVIe siècle', Henriette Witt, 1884.
Source Firkin
A monochrome pattern from a tile that can be had by selecting the rectangle in Inkscaope and using shift+alt+i
Source Firkin
To get the tile this is made up from select the rectangle in Inkscape and use 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
Lovely pattern with splattered vintage speckles.
Source David Pomfret
Prismatic Snowflakes Pattern No Background
Source GDJ
Sharp pixel pattern, just like the good old days.
Source Paridhi
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Seamless pattern formed from a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
Luxurious looking pattern (for a T-shirt maybe?) with a hint of green.
Source Simon Meek
A huge one at 800x600px. Made from a photo I took going home after work.
Source Atle Mo
Floral patterns will never go out of style, so enjoy this one.
Source Lasma