A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
The first pattern on here using opacity. Try it on a site with a colored background, or even using mixed colors.
Source Nathan Spady
The classic notebook paper with horizontal stripes.
Source Are Sundnes
The image depicts a tiled seamless pattern.The tile represents four leaves aligned every 90 ° , which may look like a bird or a dragon .The original leaf design is from a Japanese old book.
Source Yamachem
Prismatic Polka Dots 3 No Background
Source GDJ
Smooth Polaroid pattern with a light blue tint.
Source Daniel Beaton
Dark squares with some virus-looking dots in the grid.
Source Hugo Loning
Inspired by a drawing seen in 'City of Liverpool', James Picton, 1883.
Source Firkin
A background pattern inspired by designs seen in 'Burghley. The Life of William Cecil', William Charlton, 1857.
Source Firkin
Prismatic Curved Diamond Pattern 8 No Background
Source GDJ
It looks very nice I think.
Source V. Hartikainen
A seamless pattern formed from a modified version of rwwgub's tile. To get the tile, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Here's a dark background pattern that contains a steel grid pattern as a texture. Use it as a website background or for other purposes. It's free!
Source V. Hartikainen
Prismatic Isometric Cube Extra Pattern No Background
Source GDJ
This is lovely, just the right amount of subtle noise, lines and textures.
Source Richard Tabor
It almost looks a bit blurry, but then again, so are fishes.
Source Petr Šulc
Super dark, crisp and detailed. And a Kill Bill reference.
Source Badhon Ebrahim
A seamless pattern the unit cell for which can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
Super simple but very nice indeed. Gray with vertical stripes.
Source Merrin Macleod
One of the few full-color patterns here, but this one was just too good to pass up.
Source Alexey Usoltsev
This yellow background consists of a pattern of glossy gold buttons arranged in polka dot style on a seamless texture. Here's a pale yellow background pattern. Feel free to use it for your needs!
Source V. Hartikainen
This is a seamless pattern of regular hexagon which has a honeycomb structure.
Source Yamachem