After 1 comes 2, same but different. You get the idea.
Source Hendrik Lammers
Vector version of a png that was uploaded to Pixabay by pencilparker
Source Firkin
A seamless background drawn in Paint.net and vectorised with Vector Magic. The starting point was a photograph of drinking straws from Pixabay.
Source Firkin
There are quite a few grid patterns, but this one is a super tiny grid with some dust for good measure.
Source Dominik Kiss
Here's a new background image for websites with a seamless pink texture. It should look beautiful with website themes where light pink background is needed. The background is seamless, therefore it should be used as a tiled background.
Source V. Hartikainen
Prismatic Abstract Geometric Background 5 No Black
Source GDJ
More carbon fiber for your collections. This time in white or semi-dark gray.
Source Badhon Ebrahim
A seamless pattern the starting point for which was a 'rainbow twist' texture in Paint.net.
Source Firkin
An emulated “transparent” background pattern, like that of all kinds of computer graphics software.
Source AdamStanislav
A grid of squares with green colours. Since the colours are randomly distributed it is automatically seamless.
Source Firkin
Like the name says, light and gray, with some small dots and circles.
Source Brenda Lay
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
Same as the black version, but now in shades of gray. Very subtle and fine grained.
Source Atle Mo
A free background pattern with abstract green tiles.
Source V. Hartikainen
Smooth Polaroid pattern with a light blue tint.
Source Daniel Beaton