Cubes as far as your eyes can see. You know, because they tile.
Source Jan Meeus
Remixed from an image on Pixabay, the original having been uploaded by darkmoon1968.
Source Firkin
Background formed from the original with an emboss effect
Source GDJ
I have no idea what J Boo means by this name, but hey – it’s hot.
Source j Boo
Pattern #100! A black classic knit-looking pattern.
Source Factorio.us Collective
Prismatic Triangular Seamless Pattern III With Background
Source GDJ
Real snow that tiles, not easy. This is not perfect, but an attempt.
Source Atle Mo
Prismatic Curved Diamond Pattern 6 No Background
Source GDJ
Small gradient crosses inside 45-degree boxes, or bigger crosses if you will.
Source Wassim
A pattern formed from a photograph of a 16th century ceramic tile.
Source Firkin
These dots are already worn for you, so you don’t have to.
Source Matt McDaniel
A free seamless background pattern for use on websites.
Source V. Hartikainen
The image depicts a shell seamless pattern.I used an OCAL clipart called "Shell" uploaded by "jgm104".Thanks.
Source Yamachem
Prismatic Basic Pattern 2 No Background
Source GDJ
Looks a bit like concrete with subtle specks spread around the pattern.
Source Mladjan Antic
A colourful background drawn originally in paint.net and vectorised in Vector Magic.
Source Firkin
Super detailed 16×16 tile that forms a beautiful pattern of straws.
Source Pavel
The first pattern on here using opacity. Try it on a site with a colored background, or even using mixed colors.
Source Nathan Spady
Sometimes simple really is what you need, and this could fit you well.
Source Factorio.us Collective
A seamless background pattern with impressed gray dots.
Source V. Hartikainen
Love me some light mesh on a Monday. Sharp.
Source Wilmotte Bastien
A seamless pattern formed from cross 4. To get the original tile select the rectangle in Inkscape and use shift-alt-i.
Source Firkin