A seamless pattern with a unit cell drawn as a bitmap in Paint.net and vectorized in Vector Magic.
Source Firkin
This light blue background pattern is quite pleasing to the eye, it consists of a tiny rough grid pattern, which is seamless by design. That's it, if you like the color, you can use this seamless pattern in a web design without making any further modifications to it.
Source V. Hartikainen
Tiny little flowers growing on your screen. Nice, huh?
Source Themes Tube
A seamless pattern with wide vertical stripes colored in pale yellow.
Source V. Hartikainen
A series of 5 patterns. That’s what the P stands for, if you didn’t guess it.
Source Dima Shiper
This is a seamless pattern which is derived from a flower petal image.
Source Yamachem
Like the name says, light and gray, with some small dots and circles.
Source Brenda Lay
Prismatic Triangular Background Design Mark II 5
Source GDJ
Seamless Prismatic Geometric Pattern With Background
Source GDJ
New paper pattern with a slightly organic feel to it, using some thin threads.
Source Atle Mo
A background pattern with blue on white vertical stripes.
Source V. Hartikainen
A dark one with geometric shapes and dotted lines.
Source Mohawk Studios
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Remix from a drawing in 'Ostatnie chwile powstania styczniowego', Zygmunt Sulima, 1887.
Source Firkin
Looks like a technical drawing board: small squares forming a nice grid.
Source We Are Pixel8
Abstract Tiled Background Extended 10
Source GDJ
A dark metal plate with an embossed grid pattern and a bit of rust. Here's a dark metal plate texture for use as a tiled background on web pages.
Source V. Hartikainen
Kaleidoscope Prismatic Abstract No Background
Source GDJ
Prismatic Geometric Pattern Variation 2 With Background
Source GDJ
Small dots with minor circles spread across to form a nice mosaic.
Source John Burks
Remixed from a drawing in 'Hungary. A guide book. By several authors', 1890.
Source Firkin