Spice up your next school project with this icon background.
Source Swetha
To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
An interesting dark spotted pattern at an angle.
Source Hendrik Lammers
A seamlessly tile-able grunge background image.
Source V. Hartikainen
Prismatic Curved Diamond Pattern 4 No Background
Source GDJ
Tile available in Inkscape using shift-alt-i on the selected rectangle
Source Firkin
This one takes you back to math class. Classic mathematic board underlay.
Source Josh Green
Derived from an image that was uploaded to Pixabay by Darkmoon1968
Source Firkin
Real snow that tiles, not easy. This is not perfect, but an attempt.
Source Atle Mo
From a drawing in 'In an Enchanted Island', William Mallock, 1892.
Source Firkin
A seamless background pattern with impressed gray dots.
Source V. Hartikainen
A background pattern inspired by designs seen in 'Burghley. The Life of William Cecil', William Charlton, 1857.
Source Firkin
This is sort of fresh, but still feels a bit old school.
Source Martuchox
Prismatic Abstract Line Art Pattern Background 2
Source GDJ
Sometimes you just need the simplest thing.
Source Fabricio
Psychedelic Geometric Background No Black
Source GDJ
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
Remixed from a raster on Pixabay, that was uploaded by ArtsyBee.
Source Firkin
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
From a drawing in 'Resa i Afrika, genom Angola, Ovampo och Damaraland', P. Moller, 1899.
Source Firkin