A very slick dark rubber grip pattern, sort of like the grip on a camera.
Source Sinisha
The image depicts an edo-era pattern called "same-komon" or "鮫小紋"which looks like a shark skin.The "same" in Japanese means shark in English.
Source Yamachem
The starting point for this was drawn on the web site steamcoded.org/PolyskelionMaker.svg
Source Firkin
ZeroCC tileable wood boards texture, photographed and made by me. CC0
Source Sojan Janso
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
Drawn in Paint.net using the kaleidoscope plug-in and vectorised.
Source Firkin
Light gray pattern with an almost wall tile-like appearance.
Source Markus Tinner
Not sure if this is related to the Nami you get in Google image search, but hey, it’s nice!
Source Dertig Media
A repeating gloomy background image. This one consists of a pattern of black chains layered on top of a dark textured background.
Source V. Hartikainen
Fix side and a seamless pattern formed from circles.
Source SliverKnight
This pack of filters can help you adding a blocky overlay to objects. May come handy at drawing blocks of stone.
Source Lazur URH
One more sharp little tile for you. Subtle circles this time.
Source Blunia
Bit of a strange name on this one, but still nice. Tiny gray square things.
Source Carlos Valdez
Bigger is better, right? So here you have some large carbon fiber.
Source Factorio.us Collective
A seamless pattern formed from a modified version of rwwgub's tile. To get the tile, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Original seamless pattern with an Inkscape filter.
Source Firkin
Seamless pattern formed from a tile that can be had by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
A pale olive green background with a seamless texture.
Source V. Hartikainen
A smooth mid-tone gray, or low contrast if you will, linen pattern.
Source Jordan Pittman