This is indeed a bit strange, but here’s to the crazy ones!
Source Christopher Buecheler
A dark pattern made out of 3×3 circles and a 1px shadow. This works well as a carbon texture or background.
Source Atle Mo
Medium gray pattern with small strokes to give a weave effect.
Source Catherine
Fix side and a seamless pattern formed from circles.
Source SliverKnight
The green fibers pattern will work very well in grayscale as well.
Source Matteo Di Capua
Seamless Background For Websites. It has a texture similar to cork-board.
Source V. Hartikainen
The image is a remix of "edo pattern-samekomon".I changed the color of dots from black to white and added BG in light-brown.
Source Yamachem
Prismatic Triangular Seamless Pattern III With Background
Source GDJ
If you want png files of this u can download them here : viscious-speed.deviantart.com/gallery/27635117
Source Viscious-Speed
Used correctly, this could be nice. Used in a bad way, all hell will break loose.
Source Atle Mo
Everyone needs some stardust. Sprinkle it on your next project.
Source Atle Mo
A heavy dark gray base, some subtle noise and a 45-degree grid makes this look like a pattern with a tactile feel to it.
Source Atle Mo
Prismatic Abstract Geometric Background 4 No Black
Source GDJ
Scanned some rice paper and tiled it up for you. Enjoy.
Source Atle Mo
A seamless pattern formed from a square tile. To get the tile, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Abstract Ellipses Background Grayscale
Source GDJ
A dark background pattern/texture of a dimpled metal plate.
Source V. Hartikainen
The classic subtle pattern. Sort of wall/brick looking. Or moon-looking?
Source Joel Klein
He influenced us all. “Don’t be sad because it’s over. Smile because it happened.”
Source Atle Mo
Retro Circles Background 5 No Black
Source GDJ
Remixed from a drawing in 'Chambéry à la fin du XIVe siècle', Timoleon Chapperon, 1863.
Source Firkin
Prismatic Curved Diamond Pattern 7 No Background
Source GDJ
Black brick wall pattern. Brick your site up!
Source Alex Parker
Could be paper, could be a Polaroid frame – up to you!
Source Chaos