Seamless pattern the tile for which can be had by using shift-alt-I on the selected rectangle in Inkscape.
Source Firkin
A seamless pattern of "sewn stripes" colored in light gray.
Source V. Hartikainen
Nicely executed tiling for an interesting pattern.
Source Ignasi Àvila Padró
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Simple gray checkered lines, in light tones.
Source Radosław Rzepecki
It has waves, so make sure you don’t get sea sickness.
Source CoolPatterns
I have no idea how to describe this one, but it’s light and delicate.
Source JBasoo
Background Wall, Art Abstract, Block Well & CC0 texture.
Source Ractapopulous
Heavily remixed from a drawing that was uploaded to Pixabay by ractapopulous
Source Firkin
Sort of reminds me of those old house wallpapers.
Source Tish
I guess this is inspired by the city of Ravenna in Italy and its stone walls.
Source Sentel
Imagine you zoomed in 1000X on some fabric. But then it turned out to be a skeleton!
Source Angelica
Zero CC tileable ground cracked, crackled, texture, made by me.
Source Sojan Janso
Dark, crisp and subtle. Tiny black lines on top of some noise.
Source Wilmotte Bastien
Simple gray checkered lines, in light tones.
Source Radosław Rzepecki
Just like your old suit, all striped and smooth.
Source Alex Berkowitz
Submitted by DomainsInfo – wtf, right? But hey, a free pattern.
Source DomainsInfo
Abstract Geometric Monochrome Pattern Prismatic No Background
Source GDJ
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
This is a seamless pattern of a woody texture.The original image is here:https://pixabay.com/ja/users/ClassicallyPrinted-1302233/
Source Yamachem
Pixel by pixel, sharp and clean. Very light pattern with clear lines.
Source M.Ashok
Real snow that tiles, not easy. This is not perfect, but an attempt.
Source Atle Mo
Here's a quite bright pink background pattern for use on websites. It doesn't look like a real fur, but it definitely resembles one.
Source V. Hartikainen
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin