This one is something special. I’d call it a flat pattern, too. Very well done, sir!
Source GetDiscount
Used a cherry by doctormo to make this seamless pattern
Source Firkin
Abstract Ellipses Background Grayscale
Source GDJ
Prismatic Snowflakes Pattern 2 No Background
Source GDJ
A seamless pattern the starting point for which was a 'rainbow twist' texture in Paint.net.
Source Firkin
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
A very dark asfalt pattern based off of a photo taken with my iPhone.
Source Atle Mo
Same classic 45-degree pattern, dark version.
Source Luke McDonald
Seamless pattern formed from a tile that can be extracted by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
Did some testing with Repper Pro tonight, and this gray mid-tone pattern came out.
Source Atle Mo
A background pattern inspired by designs seen in 'Burghley. The Life of William Cecil', William Charlton, 1857.
Source Firkin
You know you love wood patterns, so here’s one more.
Source Richard Tabor
A monochrome pattern from a tile that can be had by selecting the rectangle in Inkscaope and using shift+alt+i
Source Firkin
From a drawing in 'Codogno e il suo territorio nella cronaca e nella storia'', Gio and Giarella Cairo, 1897.
Source Firkin
Vector version of a png that was uploaded to Pixabay by pencilparker
Source Firkin
Prismatic Basic Pattern 2 No Background
Source GDJ
Classic 45-degree pattern, light version.
Source Luke McDonald
A new take on the black linen pattern. Softer this time.
Source Atle Mo
I have no idea what J Boo means by this name, but hey – it’s hot.
Source j Boo
Remixed from a drawing in 'Maidenhood; or, the Verge of the Stream', Laura Jewry, 1876.
Source Firkin
Three shades of gray makes this pattern look like a small carbon fiber surface. Great readability even for small fonts.
Source Atle Mo
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
From a drawing in 'Maidenhood; or, the Verge of the Stream', Laura Jewry, 1876.
Source Firkin
Found on the ground in french cafe in kunming, Yunnan, china
Source Rejon
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin