I skipped number 3, because it wasn’t all that great. Sorry.
Source Dima Shiper
Prismatic Snowflakes Pattern 2 No Background
Source GDJ
Alternative colour scheme to the original.
Source Firkin
Simple combination of stripy squares with their negatively coloured counterparts
Source Firkin
Used in small doses, this could be a nice subtle pattern. Used on a large surface, it’s dirty!
Source Paul Reulat
Clover with background for St. Patrick's Day. Add to a card with a doily, ribbon, a leprechaun or other embellishments.
Source BAJ
Remixed from a design seen on Pixabay. The basic tile can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
Smooth Polaroid pattern with a light blue tint.
Source Daniel Beaton
To get the tile this is based on, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Fabric-ish patterns are close to my heart. French Stucco to the rescue.
Source Christopher Buecheler
Super detailed 16×16 tile that forms a beautiful pattern of straws.
Source Pavel
Tweed is back in style – you heard it here first. Also, the @2X version here is great!
Source Simon Leo
Did some testing with Repper Pro tonight, and this gray mid-tone pattern came out.
Source Atle Mo
Colour version that is close to the original drawing uploaded to Pixabay by pencilparker.
Source Firkin
From a drawing in 'Two Women in the Klondike', Mary Hitchcock, 1899.
Source Firkin
A free background pattern with abstract green tiles.
Source V. Hartikainen
This one takes you back to math class. Classic mathematic board underlay.
Source Josh Green
A comeback for you: the popular Escheresque, now in black.
Source Patten
To get the tile this is based on select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
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