Here's a bluish gray striped background pattern for use on web sites.
Source V. Hartikainen
Seamless pattern made from a tile that can be obtained in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
This ladies and gentlemen, is texturetastic! Love it.
Source Adam Pickering
Prismatic Abstract Geometric Background 4 No Black
Source GDJ
The classic 45-degree diagonal line pattern, done right.
Source Jorick van Hees
Remixed from a design seen in 'Burghley. The Life of William Cecil', William Charlton, 1857
Source Firkin
A repeating background with dark brown stone-like texture and abstract pattern that looks like tree trunks.
Source V. Hartikainen
Scanned some rice paper and tiled it up for you. Enjoy.
Source Atle Mo
Nice and simple crossed lines in dark gray tones.
Source Stefan Aleksić
Remixed from a drawing in 'Paul's Sister', Frances Peard, 1889.
Source Firkin
A bit like smudged paint or some sort of steel, here is scribble light.
Source Tegan Male
Brushed aluminum, in a bright gray version. Lovely 2X as well.
Source Andre Schouten
Abstract Tiled Background Extended 6
Source GDJ
Derived from an image that was uploaded to Pixabay by pugmom40
Source Firkin
This was formed by distorting an image of a background on Pixabay.
Source Firkin
The image depicts polka dot seamless pattern.
Source Yamachem
Pass parameters to the URL or edit the source code variables to configure the graph paper for the division desired.
Source JayNick
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
Vertical lines with a bumpy, yet crisp, feel to it.
Source Raasa
A free green background pattern with a pattern of rhombuses on a seamless texture. Feel free to use it as a tiled background image on your web site.
Source V. Hartikainen
Just to prove my point, here is a slightly modified dark version.
Source Atle Mo
A seamless pattern formed from a tile made from ornament 22. To get the tile, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Otis Ray Redding was an American soul singer-songwriter, record producer, arranger, and talent scout. So you know.
Source Thomas Myrman