This one is so simple, yet so good. And you know it. Has to be in the collection.
Source Gluszczenko
A seamlessly repeating background pattern of wood. The image is procedurally generated, and, I think, it's turned out quite well.
Source V. Hartikainen
Background Wall, Art Abstract, Blue Well & CC0 texture.
Source Ractapopulous
A nice looking light gray background pattern with diagonal stripes.
Source V. Hartikainen
This was formed by distorting an image of a background on Pixabay.
Source Firkin
Dead simple but beautiful horizontal line pattern.
Source Fabian Schultz
To get the tile this is based on, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
A very slick dark rubber grip pattern, sort of like the grip on a camera.
Source Sinisha
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
I guess this is inspired by the city of Ravenna in Italy and its stone walls.
Source Sentel
Floral patterns might not be the hottest thing right now, but you never know when you need it!
Source Lauren
Prismatic Abstract Geometric Background 2
Source GDJ
Bright gray tones with a hint of some metal surface.
Source Hendrik Lammers
From a drawing in 'Royal Ramsgate', James Simson, 1897.
Source Firkin
Vector version of a png that was uploaded to Pixabay by pencilparker
Source Firkin
From a drawing in 'Resa i Afrika, genom Angola, Ovampo och Damaraland', P. Moller, 1899.
Source Firkin
Nothing like a clean set of bed sheets, huh?
Source Badhon Ebrahim
A comeback for you: the popular Escheresque, now in black.
Source Patten
Snap! It’s a pattern, and it’s not grayscale! Of course you can always change the color in Photoshop.
Source Atle Mo
Seamless pattern formed from a tile that can be extracted by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin