The edges of all the red objects line up either vertically or horizontally, but it doesn't appear so. Made from a square tile that can be got by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
A seamless dark leather-like background texture with diagonal lines that look like stitches.
Source V. Hartikainen
Looks like an old wall. I guess that’s it then?
Source Viahorizon
Derived from an image that was uploaded to Pixabay by Kaz
Source Firkin
A 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
A background pattern with blue on white vertical stripes.
Source V. Hartikainen
Prismatic Rounded Squares Grid 3 No Background
Source GDJ
Prismatic Geometric Tessellation Pattern No Background
Source GDJ
A background pattern with a look of rough fabric.
Source V. Hartikainen
A seamless web background with texture of aged grid paper.
Source V. Hartikainen
A frame using leaves from an image that was uploaded to Pixabay by mayapujiati
Source Firkin
Washi (和紙?) is a type of paper made in Japan. Here’s the pattern for you!
Source Carolynne
Submitted in a cream color, but you know how I like it.
Source Devin Holmes
Dark, crisp and subtle. Tiny black lines on top of some noise.
Source Wilmotte Bastien
Remixed from a drawing in 'Analecta Eboracensia', Thomas Widdrington, 1897.
Source Firkin
A blue gray fabric-like texture for websites. An yet another fabric-like texture. It has subtle vertical and diagonal stripes to it.
Source V. Hartikainen
A seamless chequerboard pattern formed from a tile that can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
From a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
Colorful Floral Background 3 No Black
Source GDJ
Prismatic Hexagonalist Pattern No Background
Source GDJ
Subtle scratches on a light gray background.
Source Andrey Ovcharov
Inspired by a pattern found in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.
Source Firkin