From an image on opengameart.org shared by rubberduck.
Source Firkin
Background formed from the original with an emboss effect
Source GDJ
Classic 45-degree pattern, light version.
Source Luke McDonald
A seamless pattern created from a square tile. To get the tile, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Prismatic 3D Isometric Tessellation Pattern 6
Source GDJ
A lot of people like the icon patterns, so here’s one for your restaurant blog.
Source Andrijana Jarnjak
A seamless pattern based on a rectangular tile that can be retrieved in Inkscape by selecting the rectangle and using shift-alt-i.
Source Firkin
A heavy dark gray base, some subtle noise and a 45-degree grid makes this look like a pattern with a tactile feel to it.
Source Atle Mo
Derived from an image that was uploaded to Pixabay by Kaz
Source Firkin
Just to prove my point, here is a slightly modified dark version.
Source Atle Mo
A bit strange this one, but nice at the same time.
Source Diogo Silva
Spice up your next school project with this icon background.
Source Swetha
Black paper texture, based on two different images.
Source Atle Mo
Based from Design Kindle
Light honeycomb pattern made up of the classic hexagon shape.
Source Federica Pelzel
The classic 45-degree diagonal line pattern, done right.
Source Jorick van Hees
A seamless pattern recreated from an image on Pixabay. It is reminiscent of parquet flooring and is formed from a square tile, which can be recovered in Inkscape by selecting the ungrouped rectangle and using shift-alt-I together.
Source Firkin
Not so subtle. These tileable wood patterns are very useful.
Source Elemis
Prismatic Abstract Line Art Pattern Background 2
Source GDJ
Prismatic Geometric Pattern Background No Black
Source GDJ
Very dark pattern with some noise and 45-degree lines.
Source Stefan Aleksić
From a drawing in 'Artists and Arabs', Henry Blackburn, 1868
Source Firkin