The classic notebook paper with horizontal stripes.
Source Are Sundnes
Prismatic Geometric Tessellation Pattern 2 No Background
Source GDJ
A pattern drawn in Paint.net and vectorized in Inkscape.
Source Firkin
The image depicts a seamless pattern of the design which includes a stylized lotus and a stylized crane.I referred to the original image in a book which is into public domain.
Source Yamachem
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
A repeatable image with dark background and metal grid pattern.
Source V. Hartikainen
This was formed by distorting an image of a background on Pixabay.
Source Firkin
I have no idea what J Boo means by this name, but hey – it’s hot.
Source j Boo
A seamless pattern the unit cell for which can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
Vector version of a png that was uploaded to Pixabay by pencilparker
Source Firkin
Prismatic Abstract Geometric Background 4 No Black
Source GDJ
Everyone loves a diamond, right? Make your site sparkle.
Source AJ Troxell
Awesome name, great pattern. Who does not love space?
Source Nick Batchelor
Sharp pixel pattern looking like some sort of fabric.
Source Dmitry
Green Background Pattern
Source V. Hartikainen
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
The texture of this background image has some similarities with leather, and it's colored in a dark brown color. So, if you are looking for a dark brown background image for your website, this may be an option for you.
Source V. Hartikainen