Dark Brick Pattern #1032
Stone CC BY-SA 3.0A seamless pattern of dark bricks. Maybe it's not very realistic, but it looks good in my opinion.
Source V. Hartikainen
More Textures
Wood with flaky paint #2562
Wood CC 0A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Dark Wood #320
Wood CC BY-SA 3.0A beautiful dark wood pattern, superbly tiled.
Source Omar Alvarado
“Transparent” Background Pattern #493
Light CC 0An emulated “transparent” background pattern, like that of all kinds of computer graphics software.
Source AdamStanislav
Gold Wall & Dark #1254
Wall CC 0Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Rushes divider #2152
Dark CC 0From a drawing in 'Hundert Jahre in Wort und Bild', S. Stefan, 1899.
Source Firkin
Background pattern 265 #2081
Dark CC 0Remixed from a drawing in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892. The tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
Fabric pattern 2 (colour 2) #2395
Fabric CC 0Not a pattern for fabrics, but one produced from a jpg of a stack of fabric items that was posted on Pixabay. The tile that this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Background pattern 214 (colour 2) #2376
Red CC 0A seamless chequerboard pattern formed from a tile that can be had in Inkscape by selecting the rectangle and using shift+alt+i. Alternative colour scheme.
Source Firkin
Diamond pattern (colour 7) #2274
Red CC 0From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Wavy background #2015
Green CC 0A seamless pattern from a tile drawn in Paint.net and vectorised in Vector Magic
Source Firkin
White Linen #839
Light CC BY-SA 3.0Dead simple but beautiful horizontal line pattern.
Source Fabian Schultz
Prismatic Abstract Line Art Pattern Background@2X #566
Dark CC 0Prismatic Abstract Line Art Pattern Background
Source GDJ
Black Leather Texture (Seamless) #1118
Leather CC BY-SA 3.0A seamless texture of black leather. I think it will look best when used in headers, footers or sidebars.
Source V. Hartikainen