This seamless background image should look nice on websites. It has a dark blue gray texture with vertical stripes, it tiles seamlessly and, like all of the background images here, it's free. So, if you like it, take it!
Source V. Hartikainen
Real snow that tiles, not easy. This is not perfect, but an attempt.
Source Atle Mo
This could be a hippy vintage wallpaper.
Source Tileable Patterns
Remixed from a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
More tactile goodness. This time in the form of some rough cloth.
Source Bartosz Kaszubowski
A seamless pattern formed from a sports car on clker.com. To get the tile, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Prismatic Polka Dots Mark II No Background
Source GDJ
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
Prismatic Geometric Pattern Background 2
Source GDJ
Derived from an image that was uploaded to Pixabay by mdmelo.
Source Firkin
A dark pattern made out of 3×3 circles and a 1px shadow. This works well as a carbon texture or background.
Source Atle Mo
A bit strange this one, but nice at the same time.
Source Diogo Silva
This ladies and gentlemen, is texturetastic! Love it.
Source Adam Pickering
To get the tile this is based on, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Orange-red pattern for tiled backgrounds.
Source V. Hartikainen
Bigger is better, right? So here you have some large carbon fiber.
Source Factorio.us Collective
The image depicts a seamless pattern of a Japanese family crest called "chidori" in Japanese .A chidori in Japanese means a plover in English.
Source Yamachem
Zero CC tileable ground cracked, crackled, texture, made by me.
Source Sojan Janso
From a drawing in 'Heroes of North African Discovery', Nancy Meugens, 1894.
Source Firkin
Retro Circles Background 7 No Black
Source GDJ
A bit of scratched up grayness. Always good.
Source Dmitry
Geometric lines are always hot, and this pattern is no exception.
Source Listvetra
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i
Source Firkin
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
Sharp but soft triangles in light shades of gray.
Source Pixeden