To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Has nothing to do with toast, but it’s nice and subtle.
Source Pippin Lee
ZeroCC tileable stone texture, edited from pixabay, CC0
Source Sojan Janso
Prismatic Floral Pattern 3 Variation 3 No Background
Source GDJ
Some more diagonal lines and noise, because you know you want it.
Source Atle Mo
Same as the black version, but now in shades of gray. Very subtle and fine grained.
Source Atle Mo
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
Lovely pattern with splattered vintage speckles.
Source David Pomfret
Don’t look at this one too long if you’re high on something.
Source Luuk van Baars
Not the most creative name, but it’s a good all-purpose light background.
Source Dmitry
Hey, you never know when you’ll need a bird pattern, right?
Source Pete Fecteau
A lovely light gray pattern with stripes and a dash of noise.
Source V. Hartikainen
Actually remixed from a pattern on Pixabay. But then noticed a very similar one on Openclipart.org uploaded by btj51q2.
Source Firkin
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
A seamless background drawn in Paint.net and vectorised with Vector Magic. The starting point was a photograph of drinking straws from Pixabay.
Source Firkin
This is indeed a bit strange, but here’s to the crazy ones!
Source Christopher Buecheler
Some rectangles, a bit of dust and grunge, plus a hint of concrete.
Source Atle Mo
A simple example on using clones. You can generate a nice base for a pattern fill quickly with it.
Source Lazur URH
There are many carbon patterns, but this one is tiny.
Source Designova