A monochrome pattern from a tile that can be had by selecting the rectangle in Inkscaope and using shift+alt+i
Source Firkin
A seamless pattern formed from a modified version of rwwgub's tile. To get the tile, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
"Beige Stone", Tileable Texture.
Source V. Hartikainen
From a drawing in 'Handbook of the excursions proposed to be made by the Lincoln Diocesan Architectural Society, on the 27th and 28th of May, 1857', Edward Trollope, 1857.
Source Firkin
From a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
Prismatic Chevrons Pattern 5 With Background
Source GDJ
ZeroCC tileable beechwood wood texture, generated in Neo Texture Edit by me. CC0
Source Sojan Janso
This background image has seamless texture that resembles a surface of gray stone.
Source V. Hartikainen
Prismatic Chevrons Pattern 5 With Background
Source GDJ
Medium gray fabric pattern with 45-degree lines going across.
Source Atle Mo
Prismatic Curved Diamond Pattern 7 No Background
Source GDJ
As far as fabric patterns goes, this is quite crisp.
Source Heliodor Jalba
Bit of a strange name on this one, but still nice. Tiny gray square things.
Source Carlos Valdez