Inspired by this, I came up with this pattern. Madness!
Source Atle Mo
You may use it as is, or modify it as you like.
Source V. Hartikainen
Super detailed 16×16 tile that forms a beautiful pattern of straws.
Source Pavel
Prismatic Rounded Squares Grid 3 No Background
Source GDJ
Prismatic Groovy Concentric Background 3 No Black
Source GDJ
The image depicts a pattern of regular hexagon.As I made to use it for myself,I want to others to use it.Speaking about the ratio of the image, height : width = 2 : √3(1.732...)Ridiculous to say,I realized later that this image is not honey comb pattern.I have to slide the second row.
Source Yamachem
As far as fabric patterns goes, this is quite crisp.
Source Heliodor Jalba
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
A pattern formed from a squared tile. The tile can be accessed in Inkscape by selecting the rectangle and using shift-alt-i.
Source Firkin
Prismatic Snowflakes Pattern No Background
Source GDJ
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
Background Wall, Art Abstract, Blue Well & CC0 texture.
Source Ractapopulous
Zero CC tileable wood texture, made by me procedurally in Neo Texture Edit.
Source Sojan Janso
Pattern produced in Paint.net using the Vibrato plug-in.
Source Firkin
Uses spirals from Pixabay. To get the basic tile select the rectangle in Inkscape and use shift+alt+i
Source Firkin
A seamless chequerboard pattern formed from a tile that can be had in Inkscape by selecting the rectangle and using shift+alt+i. Alternative colour scheme.
Source Firkin
Zero CC tileable pine bark texture, photographed and made by me. CC0
Source Sojan Janso
This is the remix of an OCAL clipart called "Rain on Window" uploaded by "pagarmidna".Thanks.This is a seamless pattern of raindrops.
Source Yamachem
This one is something special. I’d call it a flat pattern, too. Very well done, sir!
Source GetDiscount
Colourful background achieved with gradient fills.
Source Firkin
Might not be super subtle, but quite original in its form.
Source Alex Smith
After 1 comes 2, same but different. You get the idea.
Source Hendrik Lammers
Dark, crisp and subtle. Tiny black lines on top of some noise.
Source Wilmotte Bastien
Kaleidoscope Prismatic Abstract No Background
Source GDJ
Tiny, tiny 3D cubes. Reminds me of the good old pattern from k10k.
Source Etienne Rallion