Drawn in Paint.net using the kaleidoscope plug-in and vectorised.
Source Firkin
It’s okay to be square! A nice light gray pattern with random squares.
Source Waseem Dahman
Background formed from the original with an emboss effect.
Source Firkin
Geometric triangles seem to be quite hot these days.
Source Pixeden
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
A seamless pattern that includes the original tile (go to Objects / Pattern / Pattern To Objects in Inkscape's menu to extract it).
Source GDJ
This is the third pattern called Dark Denim, but hey, we all love them!
Source Brandon Jacoby
Remixed from a JPG that was uploaded to Pixabay by Osckar
Source Firkin
The image depicts a seamless pattern which includes hexagonally-aligned gourds with BG in light-brown.
Source Yamachem
Looks like an old rug or a computer chip.
Source Patutin Sergey
I love cream! 50x50px and lovely in all the good ways.
Source Thomas Myrman
Classic vertical lines, in all its subtlety.
Source Cody L
Dare I call this a «flat pattern»? Probably not.
Source Dax Kieran
A lovely light gray pattern with stripes and a dash of noise.
Source V. Hartikainen
Pattern produced in Paint.net using the Vibrato plug-in.
Source Firkin
Got some felt in my mailbox today, so I scanned it for you to use.
Source Atle Mo
A nice and simple white rotated tile pattern.
Source Another One
Prismatic Curved Diamond Pattern 8 No Background
Source GDJ