Nice little grid. Would work great as a base on top of some other patterns.
Source Arno Gregorian
Dark squares with some virus-looking dots in the grid.
Source Hugo Loning
Abstract Tiled Background Extended 10
Source GDJ
If you like it a bit trippy, this wave pattern might be for you.
Source Ian Soper
Number 3 in a series of 5 beautiful patterns. Can be found in colors on the submitter’s website.
Source Janos Koos
Dare I call this a «flat pattern»? Probably not.
Source Dax Kieran
Derived from a drawing in 'Historiske Afhandlinger', Adolf Jorgensen, 1898.
Source Firkin
One more sharp little tile for you. Subtle circles this time.
Source Blunia
Adapted heavily from a JPG that was uploaded to Pixabay by Viscious-Speed.
Source Firkin
The tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
One of the few full-color patterns here, but this one was just too good to pass up.
Source Alexey Usoltsev
From a drawing in 'Heroes of North African Discovery', Nancy Meugens, 1894.
Source Firkin
Used in small doses, this could be a nice subtle pattern. Used on a large surface, it’s dirty!
Source Paul Reulat
The image depicts a seamless pattern of pine tree leaves.
Source Yamachem
Super detailed 16×16 tile that forms a beautiful pattern of straws.
Source Pavel
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
Looks as if it's spray painted on the wall. You can be sure that this pattern will seamlessly fill your backgrounds on web pages.
Source V. Hartikainen
A free web background image with a seamless concrete-like texture and an Indian-red color.
Source V. Hartikainen
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i
Source Firkin
Prismatic Abstract Background Design
Source GDJ