Super simple but very nice indeed. Gray with vertical stripes.
Source Merrin Macleod
Bit of a strange name on this one, but still nice. Tiny gray square things.
Source Carlos Valdez
Here's a repeatable texture that resembles a light green concrete wall or something similar.
Source V. Hartikainen
This one is amazing, truly original. Go use it!
Source Viahorizon
Seamless pattern formed from a tile that can be had by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
Brushed aluminum, in a bright gray version. Lovely 2X as well.
Source Andre Schouten
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Super simple but very nice indeed. Gray with vertical stripes.
Source Merrin Macleod
Sweet and subtle white plaster with hints of noise and grunge.
Source Phil Maurer
This is a grid, only it’s noisy. You know. Reminds you of those printed grids you draw on.
Source Vectorpile
As far as fabric patterns goes, this is quite crisp.
Source Heliodor Jalba
Prismatic Abstract Background Design No Black
Source GDJ
From a drawing in 'Cassell's Library of English Literature', Henry Morley, 1883.
Source Firkin
Zero CC tileable Laminate wood texture, photographed and made by me. CC0
Source Sojan Janso
"Beige Stone", Tileable Texture.
Source V. Hartikainen
Prismatic Rounded Squares Grid 3 No Background
Source GDJ
A comeback for you: the popular Escheresque, now in black.
Source Patten
Recreated from a pattern found in 'Az Osztrák-Magyar Monarchia irásban és képben', 1882. To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
The square tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
From a drawing in 'La Principauté de Liège et les Pays-Bas au XVIe siècle', Société des Bibliophiles Liégeois ,1887.
Source Firkin
You know I love paper patterns. Here is one from Stephen. Say thank you!
Source Stephen Gilbert