The tile this fill pattern is based on can be had by using shift+alt+i on the rectangle.
Source Firkin
No relation to the band, but damn it’s subtle!
Source Thomas Myrman
Looks like a technical drawing board: small squares forming a nice grid.
Source We Are Pixel8
Adapted from a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
Geometric triangles seem to be quite hot these days.
Source Pixeden
Super dark, crisp and detailed. And a Kill Bill reference.
Source Badhon Ebrahim
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
The image depicts a seamless pattern of a Japanese family crest called "chidori" in Japanese .A chidori in Japanese means a plover in English.
Source Yamachem
Seamless Prismatic Quadrilateral Line Art Pattern No Background
Source GDJ
This tiled background comes in red and consists of tiles that look like gemstones. It is more for blogs or social profiles, I think.
Source V. Hartikainen
Remixed from an image on Pixabay, the original having been uploaded by darkmoon1968.
Source Firkin
Beautiful dark noise pattern with some dust and grunge.
Source Vincent Klaiber
Just like your old suit, all striped and smooth.
Source Alex Berkowitz
Sharp diamond pattern. A small 24x18px tile.
Source Tom Neal
The classic 45-degree diagonal line pattern, done right.
Source Jorick van Hees
Prismatic Groovy Concentric Background 4 No Black
Source GDJ
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Prismatic Geometric Pattern Background 2
Source GDJ
Remixed from a drawing in 'Maidenhood; or, the Verge of the Stream', Laura Jewry, 1876.
Source Firkin
Prismatic Groovy Concentric Background 4 No Black
Source GDJ
Prismatic Isometric Cube Extra Pattern No Background
Source GDJ