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
Decorative divider #1995
Yellow CC 0From a drawing of the coat of arms of the Ottoman Empire on Wikimedia.
Source Firkin
Decorative divider 284 #1848
Dark CC 0From a drawing in 'In an Enchanted Island', William Mallock, 1892.
Source Firkin
Prismatic Geometric Tessellation Pattern 4 No Background #557
Noise CC 0Prismatic Geometric Tessellation Pattern 4 No Background
Source GDJ
Elegant Grid@2X #317
Wall CC BY-SA 3.0This is a hot one. Small, sharp and unique.
Source GraphicsWall
Checkered Pattern #322
Grid CC BY-SA 3.0Simple gray checkered lines, in light tones.
Source Radosław Rzepecki
Floral design 99 (colour) #1777
Green CC 0From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
Gray Diagonal Stripes Background #900
Stripes CC BY-SA 3.0A nice looking light gray background pattern with diagonal stripes.
Source V. Hartikainen
Dark Stitched Leather Background #996
Stripes CC BY-SA 3.0A seamless dark leather-like background texture with diagonal lines that look like stitches.
Source V. Hartikainen
Background pattern 306 (colour 4) #1877
Colorful CC 0Seamless pattern the tile for which can be had by using shift-alt-I on the selected rectangle in Inkscape.
Source Firkin
Fabric pattern 3 (colour 3) #2385
Fabric CC 0Alternative colour scheme. Not 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
"Beige Stone", Tileable Texture #1025
Stone CC BY-SA 3.0"Beige Stone", Tileable Texture.
Source V. Hartikainen