8 by 8 pixels, and just what the title says.
Source pixilated
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Sharp but soft triangles in light shades of gray.
Source Pixeden
Abstract Stars Geometric Pattern Prismatic No Background
Source GDJ
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Neat little photography icon pattern.
Source Hossam Elbialy
A seamless pattern of dark bricks. Maybe it's not very realistic, but it looks good in my opinion.
Source V. Hartikainen
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
Seamless tile drawn in Paint.net and vectorised in Vector Magic.
Source Firkin
A set of paper filters. The base texture is generated the same way, only the compositing mode is varied.
Source Lazur URH
Same as the black version, but now in shades of gray. Very subtle and fine grained.
Source Atle Mo
Remixed from a drawing in 'The Canadian horticulturist', 1892
Source Firkin
Remixed from a drawing in 'Hungary. A guide book. By several authors', 1890.
Source Firkin
A new one called white wall, not by me this time.
Source Yuji Honzawa
The file was named striped lens, but hey – Translucent Fibres works too.
Source Angelica
A seamless pattern formed from a square tile. The tile can be retrieved by selecting the rectangle in Inkscape and using shift-alt-I. A version of the original with random colors.
Source Firkin
With a name this awesome, how can I go wrong?
Source Nikolay Boltachev
Prismatic Rounded Squares Grid 4 No Background
Source GDJ
Seamless pattern formed from a tile that can be extracted by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
Greyscale version of a pattern that came out of playing with the 'slinky' plug-in for Paint.net
Source Firkin
A seamless pattern the starting point for which was a 'colour modulo' texture in Paint.net.
Source Firkin
To get the tile this is made up from select the rectangle in Inkscape and use shift+alt+i.
Source Firkin