Small gradient crosses inside 45-degree boxes, or bigger crosses if you will.
Source Wassim
This is the remix of "polka dot seamless pattern".The image depicts polka dot seamless pattern.
Source Yamachem
A pattern drawn in Paint.net and vectorized in Inkscape.
Source Firkin
I love the movie Pineapple Express, and I’m also liking this Pineapple right here.
Source Audee Mirza
You guessed it – looks a bit like cloth.
Source Peax Webdesign
A seamless tessellation pattern. To get the tile this is formed from, select the pattern in Inkscape and use shift+alt+i.
Source Firkin
The tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
A seamless pattern formed from a square tile. The tile can be retrieved by selecting the rectangle in Inkscape and using shift-alt-I. A version of the original with random colors.
Source Firkin
You know I’m a sucker for these. Well-crafted paper pattern.
Source Mihaela Hinayon
Remixed from a drawing in 'The Canadian horticulturist', 1892
Source Firkin
The base gradient edited so now more details are rendered.
Source Lazur URH
Number five from the same submitter, makes my job easy.
Source Dima Shiper
This is so subtle you need to bring your magnifier!
Source Carlos Valdez
Black brick wall pattern. Brick your site up!
Source Alex Parker
Prismatic Geometric Pattern Background
Source GDJ
Abstract Tiled Background Extended 10
Source GDJ
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Dark squares with some virus-looking dots in the grid.
Source Hugo Loning
Looks like an old rug or a computer chip.
Source Patutin Sergey
CC0 and seamless wellington boot pattern.
Source SliverKnight
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
A dark metal plate with an embossed grid pattern and a bit of rust. Here's a dark metal plate texture for use as a tiled background on web pages.
Source V. Hartikainen