Looks like a technical drawing board: small squares forming a nice grid.
Source We Are Pixel8
A dark gray, sandy pattern with small light dots, and some angled strokes.
Source Atle Mo
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
Number 5 in a series of 5 beautiful patterns. Can be found in colors on the submitter’s website.
Source Janos Koos
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
Not sure if this is related to the Nami you get in Google image search, but hey, it’s nice!
Source Dertig Media
Sometimes simple really is what you need, and this could fit you well.
Source Factorio.us Collective
A light gray wall or floor (you decide) of concrete.
Source Atle Mo
Remixed from a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
Bumps, highlight and shadows – all good things.
Source Badhon Ebrahim
The Grid. A digital frontier. I tried to picture clusters of information as they traveled through the computer.
Source Haris Šumić
The classic subtle pattern. Sort of wall/brick looking. Or moon-looking?
Source Joel Klein
No relation to the band, but damn it’s subtle!
Source Thomas Myrman
From a drawing in 'Uit de geschiedenis der Heilige Stede te Amsterdam', Yohannes Sterck, 1898.
Source Firkin
This is lovely, just the right amount of subtle noise, lines and textures.
Source Richard Tabor
From a drawing in 'Cassell's Library of English Literature', Henry Morley, 1883.
Source Firkin
The rectangular tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
Used the 6th circle pattern designed by Viscious-Speed to create a print that can be used for card making or scrapbooking. Save as a PDF file for the best printing option.
Source Lovinglf
The perfect pattern for all your blogs about type, or type-related matters.
Source Atle Mo
Prismatic Curved Diamond Pattern 4 No Background
Source GDJ
This is the remix of "Background pattern 115" uploaded by "Firkin".Thanks.
Source Yamachem
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