Seamless pattern formed from a tile that can be extracted by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
A background pattern with green vertical stripes. A new striped background pattern. This time a green one.
Source V. Hartikainen
Derived from an image that was uploaded to Pixabay by Darkmoon1968
Source Firkin
From a drawing in 'Les Chroniqueurs de l'Histoire de France depuis les origines jusqu'au XVIe siècle', Henriette Witt, 1884.
Source Firkin
To get the tile this is based on, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Fix side and a seamless pattern formed from circles.
Source SliverKnight
Colourful background achieved with gradient fills.
Source Firkin
A grid of squares with green colours. Since the colours are randomly distributed it is automatically seamless.
Source Firkin
Brushed aluminum, in a bright gray version. Lovely 2X as well.
Source Andre Schouten
The classic subtle pattern. Sort of wall/brick looking. Or moon-looking?
Source Joel Klein
The following orange background pattern resembles a honeycomb.
Source V. Hartikainen
This is a remix of "geometrical pattern 01".
Source Yamachem
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
A free black metallic background pattern. Here's a new pattern I made that looks metallic.
Source V. Hartikainen
Not so subtle. These tileable wood patterns are very useful.
Source Elemis
This is the remix of "Strawberry Pattern Background" uploaded by "GDJ". Thanks. I realigned strawberries so as to get seamless and changed the BG color.
Source Yamachem
Prismatic Abstract Background Design No Black
Source GDJ
As far as fabric patterns goes, this is quite crisp.
Source Heliodor Jalba
Abstract Tiled Background Extended 11
Source GDJ
Nothing like a clean set of bed sheets, huh?
Source Badhon Ebrahim
Derived from an image that was uploaded to Pixabay by Darkmoon1968
Source Firkin
This one could be the shirt of a golf player. Angled lines in different thicknesses.
Source Olivier Pineda
Washi (和紙?) is a type of paper made in Japan. Here’s the pattern for you!
Source Carolynne
An abstract texture of black metal pipes (seamless).
Source V. Hartikainen
Super simple but very nice indeed. Gray with vertical stripes.
Source Merrin Macleod
Same as the black version, but now in shades of gray. Very subtle and fine grained.
Source Atle Mo