To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Embossed lines and squares with subtle highlights.
Source Alex Parker
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
From a drawing in 'Hundert Jahre in Wort und Bild', S. Stefan, 1899.
Source Firkin
Sounds French. Some 3D square diagonals, that’s all you need to know.
Source Graphiste
This was formed by distorting an image of a background on Pixabay.
Source Firkin
Here's an yet another background for websites, with a seamless texture of wood planks this time.
Source V. Hartikainen
Number 3 in a series of 5 beautiful patterns. Can be found in colors on the submitter’s website.
Source Janos Koos
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Remixed from a design found in 'History of the Virginia Company of London; with letters to and from the first Colony, never before printed', Edward Neill, 1869.
Source Firkin
Adapted heavily from a JPG that was uploaded to Pixabay by Viscious-Speed.
Source Firkin
A seamless background pattern with impressed gray dots.
Source V. Hartikainen
From a drawing in 'The Quiver of Love', Walter Crane, 1876
Source Firkin
More Japanese-inspired patterns, Gold Scales this time.
Source Josh Green
The following orange background pattern resembles a honeycomb.
Source V. Hartikainen
A cute x, if you need that sort of thing.
Source Juan Scrocchi
A pattern derived from repeating unit cells each derived from part of a fractal rendering in paint.net.
Source Firkin
Everyone loves a diamond, right? Make your site sparkle.
Source AJ Troxell