8 by 8 pixels, and just what the title says.
Source pixilated
A nice and simple gray stucco material. Great on its own, or as a base for a new pattern.
Source Bartosz Kaszubowski
Lovely light gray floral motif with some subtle shades.
Source GraphicsWall
This one is amazing, truly original. Go use it!
Source Viahorizon
Luxurious looking pattern (for a T-shirt maybe?) with a hint of green.
Source Simon Meek
Seamless pattern formed from a tile that can be extracted by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
Here's a new gray "fabric" pattern. Use it as backgrounds for websites or for other purposes.
Source V. Hartikainen
Number 1 in a series of 5 beautiful patterns. Can be found in colors on the submitter’s website.
Source Janos Koos
Could be paper, could be a Polaroid frame – up to you!
Source Chaos
One more in the line of patterns inspired by Japanese/Asian styles. Smooth.
Source Kim Ruddock
Cubes as far as your eyes can see. You know, because they tile.
Source Jan Meeus
A seamless pattern the unit cell for which can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
From a drawing in 'At home', J. Sowerby, J. Crane and T. Frederick, 1881.
Source Firkin
One more updated pattern. Not really carbon fiber, but it’s the most popular pattern, so I’ll give you an extra choice.
Source Atle Mo
This could be a hippy vintage wallpaper.
Source Tileable Patterns
Stefan is hard at work, this time with a funky pattern of squares.
Source Stefan Aleksić
A dark striped seamless pattern suitable for use as a background on websites.
Source V. Hartikainen
A seamless pattern created from a square tile. To get the tile, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Derived from a JPG that was uploaded to Pixabay by ractapopulous
Source Firkin
Abstract Tiled Background Extended 12
Source GDJ