8 by 8 pixels, and just what the title says.
Source pixilated
This is so subtle: We’re talking 1% opacity. Get your squint on!
Source Atle Mo
Bright gray tones with a hint of some metal surface.
Source Hendrik Lammers
A bit of scratched up grayness. Always good.
Source Dmitry
Super detailed 16×16 tile that forms a beautiful pattern of straws.
Source Pavel
A pattern derived from repeating unit cells each derived from part of a fractal rendering in paint.net.
Source Firkin
Seamless pattern formed from a tile that can be extracted by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
This seamless pattern consists of a blue grid on a yellow background.
Source V. Hartikainen
A seamless pattern with green and yellow diagonal lines on top of a white dotted background.
Source V. Hartikainen
Remixed from a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
Basket Fibers, Basket Texture, Braid Background style CC0 texture.
Source 1A-Photoshop
A seamless pattern created from a square tile. To get the tile, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
This is the third pattern called Dark Denim, but hey, we all love them!
Source Brandon Jacoby
Not so subtle. These tileable wood patterns are very useful.
Source Elemis
Zero CC plastic pattern texture, photographed and made by me. CC0 *Note, this texture was on the perfectly smooth surface of a plastic shovel scraper, not sure how to call it. Plz coment if you know what its called.
Source Sojan Janso
Floral patterns might not be the hottest thing right now, but you never know when you need it!
Source Lauren
Sort of like the back of a wooden board. Light, subtle, and stylish, just the way we like it!
Source Nikolalek
First pattern tailor-made for Retina, with many more to come. All the old ones are upscaled, in case you want to re-download.
Source Atle Mo
This one looks like a cork panel. Feel free to use it as a tiled background on your blog or website.
Source V. Hartikainen
Prismatic Groovy Concentric Background 4 No Black
Source GDJ