One more sharp little tile for you. Subtle circles this time.
Source Blunia
A seamless pattern with green and yellow diagonal lines on top of a white dotted background.
Source V. Hartikainen
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Remixed from a drawing in 'In an Enchanted Island', William Mallock, 1892.
Source Firkin
A seamless background texture of old cardboard.
Source V. Hartikainen
A series of 5 patterns. That’s what the P stands for, if you didn’t guess it.
Source Dima Shiper
That’s what it is, a dark dot. Or sort of carbon looking.
Source Tsvetelin Nikolov
Tweed is back in style – you heard it here first. Also, the @2X version here is great!
Source Simon Leo
A background pattern inspired by designs seen in 'Burghley. The Life of William Cecil', William Charlton, 1857.
Source Firkin
Produced using the clouds, flames and glass blocks plug-ins in Paint.net and the resulting .PNG vectorised with Vector Magic.
Source Firkin
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
An alternative colour scheme for the original background.
Source Firkin
Just to prove my point, here is a slightly modified dark version.
Source Atle Mo
Prismatic Groovy Concentric Background 3 No Black
Source GDJ
A simple example on using clones. You can generate a nice base for a pattern fill quickly with it.
Source Lazur URH
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
Remixed from an image that was uploaded to Pixabay by Pixeline
Source Firkin
Cubes as far as your eyes can see. You know, because they tile.
Source Jan Meeus
This is a semi-dark pattern, sort of linen-y.
Source Sagive SEO
More tactile goodness. This time in the form of some rough cloth.
Source Bartosz Kaszubowski
A version without colours blended together to give a different look.
Source Firkin
Not a pattern for fabrics, but one produced from a jpg of a stack of fabric items that was posted on Pixabay. The tile that this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin