With a name like this, it has to be hot. Diagonal lines in light shades.
Source Isaac
A bit like some carbon, or knitted netting if you will.
Source Anna Litvinuk
Formed from a tile based on a drawing from 'Viaggi d'un artista nell'America Meridionale', Guido Boggiani, 1895.
Source Firkin
Vertical lines with a bumpy, yet crisp, feel to it.
Source Raasa
Dark wooden pattern, given the subtle treatment. based on texture from Cloaks. https://cloaks.deviantart.com
Source Atle Mo
I love these crisp, tiny, super subtle patterns.
Source Badhon Ebrahim
A background pattern inspired by designs seen in 'Burghley. The Life of William Cecil', William Charlton, 1857.
Source Firkin
Very dark pattern with some noise and 45-degree lines.
Source Stefan Aleksić
Background Wall, Art Abstract, Blue Well & CC0 texture.
Source Ractapopulous
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
A bit like smudged paint or some sort of steel, here is scribble light.
Source Tegan Male
Colorful Floral Background 3 No Black
Source GDJ
A seamless pattern the unit cell for which can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
Neat little photography icon pattern.
Source Hossam Elbialy
A dark metallic background with a pattern of stamped dots. Here's a dark "metallic" background pattern for you.
Source V. Hartikainen
Not strictly seamless in that opposite edges are not identical. But they do marry up to make an interesting pattern
Source Firkin
From a drawing in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.
Source Firkin
Lovely pattern with splattered vintage speckles.
Source David Pomfret
Just like the black maze, only in light gray. Duh.
Source Peax
Prismatic Geometric Pattern Background 2
Source GDJ
The file was named striped lens, but hey – Translucent Fibres works too.
Source Angelica
A free tileable background colored in off-white (antique white) color.
Source V. Hartikainen