The tile this fill pattern is based on can be had by using shift+alt+i on the rectangle.
Source Firkin
I know there is one here already, but this is sexy!
Source Gjermund Gustavsen
Fix side and a seamless pattern formed from circles.
Source SliverKnight
Turn your site into a dragon with this great scale pattern.
Source Alex Parker
Bigger is better, right? So here you have some large carbon fiber.
Source Factorio.us Collective
Cubes as far as your eyes can see. You know, because they tile.
Source Jan Meeus
Prismatic Snowflakes Pattern 3 No Background
Source GDJ
Sharp but soft triangles in light shades of gray.
Source Pixeden
Seamless Prismatic Quadrilateral Line Art Pattern No Background
Source GDJ
Carbon fiber is never out of fashion, so here is one more style for you.
Source Alfred Lee
The image depicts a tiled seamless pattern.The tile represents four leaves aligned every 90 ° , which may look like a bird or a dragon .The original leaf design is from a Japanese old book.
Source Yamachem
As far as fabric patterns goes, this is quite crisp.
Source Heliodor Jalba
Prismatic Curved Diamond Pattern 4 No Background
Source GDJ
CC0 and seamless wellington boot pattern.
Source SliverKnight
Utilising some flowers from Almeidah. To get the unit tile, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Utilising a bird from s-light and some flowers from Almeidah. To get the unit tile, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Alternative colour scheme. Not a pattern for fabrics, but one produced from a jpg of a stack of fabric items that was posted on Pixabay. The tile that this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Prismatic Groovy Concentric Background 4
Source GDJ
To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Did some testing with Repper Pro tonight, and this gray mid-tone pattern came out.
Source Atle Mo