Seamless pattern formed from a tile that can be had by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
A good starting point for a cardboard pattern. This would work well in a variety of colors.
Source Atle Mo
Tiny circle waves, almost like the ocean.
Source Sagive
Utilising some flowers from Almeidah. To get the unit tile, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Prismatic Geometric Tessellation Pattern No Background
Source GDJ
Seamless pattern the tile for which can be had by using shift-alt-I on the selected rectangle in Inkscape.
Source Firkin
I love these crisp, tiny, super subtle patterns.
Source Badhon Ebrahim
Based on an image that was uploaded to Pixabay by devanath
Source Firkin
No, not the band but the pattern. Simple squares in gray tones, of course.
Source Atle Mo
This makes me wanna shoot some pool! Sweet green pool table pattern.
Source Caveman
Remixed from an image that was uploaded to Pixabay by Pixeline
Source Firkin
A beautiful dark wood pattern, superbly tiled.
Source Omar Alvarado
Luxurious looking pattern (for a T-shirt maybe?) with a hint of green.
Source Simon Meek
Don’t look at this one too long if you’re high on something.
Source Luuk van Baars
Submitted by DomainsInfo – wtf, right? But hey, a free pattern.
Source DomainsInfo
Smooth Polaroid pattern with a light blue tint.
Source Daniel Beaton
A seamless background of warped stripes on paper.
Source V. Hartikainen
Inspired by a drawing in 'Poems', James Smith, 1881.
Source Firkin
No relation to the band, but damn it’s subtle!
Source Thomas Myrman
Fix side and a seamless pattern formed from circles.
Source SliverKnight
One can never have too few rice paper patterns, so here is one more.
Source Atle Mo
From a drawing in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.
Source Firkin