With a name like this, it has to be hot. Diagonal lines in light shades.
Source Isaac
Prismatic Rounded Squares Grid 4 No Background
Source GDJ
Seamless pattern formed from a tile that can be extracted by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
Stefan is hard at work, this time with a funky pattern of squares.
Source Stefan Aleksić
This one is so simple, yet so good. And you know it. Has to be in the collection.
Source Gluszczenko
Adapted from an image that was uploaded to Pixabay by Anerma.
Source Firkin
Dead simple but beautiful horizontal line pattern.
Source Fabian Schultz
This one is rather fun and playful. The 2X could be used at 1X too!
Source Welsley
Medium gray fabric pattern with 45-degree lines going across.
Source Atle Mo
Prismatic Groovy Concentric Background 5 No Black
Source GDJ
A large (588x375px) sand-colored pattern for your ever-growing collection. Shrink at will.
Source Alex Tapein
Green Web Background, Seamless tile.
Source V. Hartikainen
A free seamless background pattern for use on websites.
Source V. Hartikainen
A free grid paper background pattern for using on web sites.
Source V. Hartikainen
A seamless pattern formed from background pattern 102
Source Firkin
From a drawing in 'Codogno e il suo territorio nella cronaca e nella storia'', Gio and Giarella Cairo, 1897.
Source Firkin
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin