Medium gray pattern with small strokes to give a weave effect.
Source Catherine
Prismatic Curved Diamond Pattern 2 No Background
Source GDJ
Prismatic Isometric Cube Extra Pattern No Background
Source GDJ
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Vector version of a png that was uploaded to Pixabay by pencilparker
Source Firkin
Some rectangles, a bit of dust and grunge, plus a hint of concrete.
Source Atle Mo
A grid of squares with green colours. Since the colours are randomly distributed it is automatically seamless.
Source Firkin
Remixed from a design on Pixabay. To get the tile this is based on select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
From a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
Not strictly seamless in that opposite edges are not identical. But they do marry up to make an interesting pattern
Source Firkin
Beautiful dark noise pattern with some dust and grunge.
Source Vincent Klaiber
Derived from an image that was uploaded to Pixabay by starchim01
Source Firkin
A repeating background with dark brown stone-like texture and abstract pattern that looks like tree trunks.
Source V. Hartikainen
Remixed from a drawing in 'A Child of the Age', Francis Adams, 1894.
Source Firkin
Submitted by DomainsInfo – wtf, right? But hey, a free pattern.
Source DomainsInfo
Derived from an image that was uploaded to Pixabay by pugmom40
Source Firkin
Nothing like a clean set of bed sheets, huh?
Source Badhon Ebrahim
Formed by heavily distorting part of a an image of a fish uploaded to Pixabay by GLady
Source Firkin
Remixed from a JPG that was uploaded to Pixabay by theasad121
Source Firkin
Abstract Ellipses Background Grayscale
Source GDJ
Prismatic Hexagonalist Pattern No Background
Source GDJ
Prismatic Geometric Tessellation Pattern 2 No Background
Source GDJ
A seamless dark leather-like background texture with diagonal lines that look like stitches.
Source V. Hartikainen