Never out of fashion and so much hotter than the 45º everyone knows, here is a sweet 60º line pattern.
Source Atle Mo
A very dark spotted twinkle pattern for your twinkle needs.
Source Badhon Ebrahim
A seamless chequerboard pattern formed from a tile that can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
A light gray fabric pattern with faded vertical stripes.
Source V. Hartikainen
It almost looks a bit blurry, but then again, so are fishes.
Source Petr Šulc
Made by distorting a simple pattern using the 'sin waves' plugin for Paint.net and vectorising in Vector Magic
Source Firkin
Has nothing to do with toast, but it’s nice and subtle.
Source Pippin Lee
Seamless Prismatic Geometric Pattern With Background
Source GDJ
Fix and cc0 to get the tile this is based on.
Source SliverKnight
Dark, square, clean and tidy. What more can you ask for?
Source Jaromír Kavan
I guess this is inspired by the city of Ravenna in Italy and its stone walls.
Source Sentel
From a drawing in 'The Quiver of Love', Walter Crane, 1876
Source Firkin
Colour version that is close to the original drawing uploaded to Pixabay by pencilparker.
Source Firkin
One can never have too few rice paper patterns, so here is one more.
Source Atle Mo
Simple gray checkered lines, in light tones.
Source Radosław Rzepecki
Might not be super subtle, but quite original in its form.
Source Alex Smith
A dark brown fabric-like background texture with seamless pattern of winding stripes.
Source V. Hartikainen
A heavy dark gray base, some subtle noise and a 45-degree grid makes this look like a pattern with a tactile feel to it.
Source Atle Mo
Colour version of the original pattern.
Source Firkin
From a drawing in 'Friend or Fortune? The story of a strange year', Robert Overton, 1897.
Source Firkin
I have no idea what J Boo means by this name, but hey – it’s hot.
Source j Boo
Remixed from a drawing in 'The Canadian horticulturist', 1892
Source Firkin
Vector version of a png that was uploaded to Pixabay by pencilparker
Source Firkin