A chequerboard pattern with a fruit theme. The fruits are from a posting by inkscapeforum.it.
Source Firkin
A grid of squares with green colours. Since the colours are randomly distributed it is automatically seamless.
Source Firkin
Remixed from a design seen in 'Burghley. The Life of William Cecil', William Charlton, 1857. The tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Prismatic Geometric Pattern Variation 2 With Background
Source GDJ
Scanned some rice paper and tiled it up for you. Enjoy.
Source Atle Mo
Tiny, tiny 3D cubes. Reminds me of the good old pattern from k10k.
Source Etienne Rallion
A very slick dark rubber grip pattern, sort of like the grip on a camera.
Source Sinisha
A dark metallic background with a pattern of stamped dots. Here's a dark "metallic" background pattern for you.
Source V. Hartikainen
Colour version that is close to the original drawing uploaded to Pixabay by pencilparker.
Source Firkin
Mostly just mucked about with the colours and made one of the paths in the lead frame opaque. The glass remains transparent.
Source Firkin
You don’t see many mid-tone patterns here, but this one is nice.
Source Joel Klein
A seamless pattern made from the gold Penrose triangle by GDJ and the two remixes
Source Firkin
As far as fabric patterns goes, this is quite crisp.
Source Heliodor Jalba
Light honeycomb pattern made up of the classic hexagon shape.
Source Federica Pelzel
Retro Circles Background 4 No Black
Source GDJ
Remixed from a drawing in 'Maidenhood; or, the Verge of the Stream', Laura Jewry, 1876.
Source Firkin
Remixed from a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
Small dots with minor circles spread across to form a nice mosaic.
Source John Burks
It was called Navy Blue, but I made it dark. You know, the way I like it.
Source Ethan Hamilton
This one is super crisp at 2X. Lined paper with some dust and scratches.
Source HQvectors
Vertical lines with a bumpy, yet crisp, feel to it.
Source Raasa