The first pattern on here using opacity. Try it on a site with a colored background, or even using mixed colors.
Source Nathan Spady
A comeback for you: the popular Escheresque, now in black.
Source Patten
A bit like some carbon, or knitted netting if you will.
Source Anna Litvinuk
Remixed from a design on Pixabay. To get the tile this is based on select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Background formed from the original with an emboss effect
Source GDJ
Wild Oliva or Oliva Wilde? Darker than the others, sort of a medium dark pattern.
Source Badhon Ebrahim
Tiny little flowers growing on your screen. Nice, huh?
Source Themes Tube
Not so subtle. These tileable wood patterns are very useful.
Source Elemis
Classic 45-degree pattern, light version.
Source Luke McDonald
This ons is quite old school looking. Retro, even. I like it.
Source Arno Declercq
Very dark pattern with some noise and 45-degree lines.
Source Stefan Aleksić
Used in small doses, this could be a nice subtle pattern. Used on a large surface, it’s dirty!
Source Paul Reulat
A free seamless background texture that looks like a brown stone wall.
Source V. Hartikainen
Dark, crisp and subtle. Tiny black lines on top of some noise.
Source Wilmotte Bastien
These dots are already worn for you, so you don’t have to.
Source Matt McDaniel
The classic notebook paper with horizontal stripes.
Source Are Sundnes
The act or state of corrugating or of being corrugated, a wrinkle; fold; furrow; ridge.
Source Anna Litvinuk
To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Brushed aluminum, in a bright gray version. Lovely 2X as well.
Source Andre Schouten
White fabric looking texture with some nice random wave features.
Source Hendrik Lammers
A seamless pattern formed from a square tile. The tile can be retrieved by selecting the rectangle in Inkscape and using shift-alt-i
Source Firkin
Remixed from a JPG that was uploaded to Pixabay by susanlu4esm
Source Firkin
Sounds French. Some 3D square diagonals, that’s all you need to know.
Source Graphiste
ZeroCC tileable stone texture, edited from pixabay. CC0
Source Sojan Janso