A seamless pattern formed from a rectangular tile. The tile can be retrieved by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
Here's a subtle marble-like background for use on websites.
Source V. Hartikainen
This one is amazing, truly original. Go use it!
Source Viahorizon
Prismatic Abstract Geometric Background 5 No Black
Source GDJ
The name is totally random, but hey, it sounds good.
Source Atle Mo
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Pass parameters to the URL or edit the source code variables to configure the graph paper for the division desired.
Source JayNick
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Formed by distorting a JPG from PublicDomainPictures
Source Firkin
Embossed lines and squares with subtle highlights.
Source Alex Parker
This ladies and gentlemen, is texturetastic! Love it.
Source Adam Pickering
Remixed from a JPG that was uploaded to Pixabay by Osckar
Source Firkin
Zero CC tileable hard cover cells book texture, 4k, scanned and made by me. CC0
Source Sojan Janso
Dark pattern with some nice diagonal stitched lines crossing over.
Source Ashton
Inspired by a drawing seen in 'City of Liverpool', James Picton, 1883.
Source Firkin
Can’t believe we don’t have this in the collection already! Slick woven pattern with crisp details.
Source Max Rudberg
A repeating background with seamless texture of stone. There haven't been any stone-like backgrounds for a while, so I have decided to create one more. The rest can be found in the appropriate category.
Source V. Hartikainen
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Prismatic Curved Diamond Pattern No Background
Source GDJ
A bit like some carbon, or knitted netting if you will.
Source Anna Litvinuk