"Beige Stone", Seamless Web Texture #1031
Stone CC BY-SA 3.0It looks like a polished stone surface to me. Download it for free, as always.
Source V. Hartikainen
More Textures
Corrugation #765
Light CC BY-SA 3.0The act or state of corrugating or of being corrugated, a wrinkle; fold; furrow; ridge.
Source Anna Litvinuk
Background pattern blue #1955
Blue CC 0To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Gray Lines@2X #914
Light CC BY-SA 3.0Some more diagonal lines and noise, because you know you want it.
Source Atle Mo
Prismatic Groovy Concentric Background 4@2X #462
Noise CC 0Prismatic Groovy Concentric Background 4
Source GDJ
Grid@2X #975
Gray CC BY-SA 3.0There are quite a few grid patterns, but this one is a super tiny grid with some dust for good measure.
Source Dominik Kiss
Ravenna@2X #355
Wall CC BY-SA 3.0I guess this is inspired by the city of Ravenna in Italy and its stone walls.
Source Sentel
Mossy planks #2565
Wood CC 0A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
Stone Granite #1292
Stone CC 0ZeroCC tileabel stone granite texture, edited from pixabay. CC0
Source Sojan Janso
Retro Circles Background 4 No Black@2X #423
Dark CC 0Retro Circles Background 4 No Black
Source GDJ
Wood@2X #50
Wood CC BY-SA 3.0Dark wooden pattern, given the subtle treatment. based on texture from Cloaks. https://cloaks.deviantart.com
Source Atle Mo
Floral background 11 #2044
Dark CC 0Remixed from a drawing in 'The March of Loyalty', Letitia MacClintock, 1884.
Source Firkin
Stripy checkerboard pattern #1768
Dark CC 0Simple combination of stripy squares with their negatively coloured counterparts
Source Firkin
Background pattern 8 (black) #209
Dark CC 0Black version of a pattern that came out of playing with the 'light rays' plug-in for Paint.net
Source Firkin
Skeletal Weave@2X #932
Light CC BY-SA 3.0Imagine you zoomed in 1000X on some fabric. But then it turned out to be a skeleton!
Source Angelica
Argyle@2X #644
Dark CC BY-SA 3.0Classy golf-pants pattern, or crossed stripes if you will.
Source Will Monson
Fruit pattern 4 #2453
Pink CC 0A chequerboard pattern with a fruit theme. The fruits are from a posting by inkscapeforum.it.
Source Firkin
Decorative divider 223 #2207
Dark CC 0Inspired by a design found in 'Konstantinápolyi emlékeim', Miklos Chriszto, 1893.
Source Firkin
Grunge Wall #81
Wall CC BY-SA 3.0Light gray grunge wall with a nice texture overlay.
Source Adam Anlauf
Disks pattern #1890
Dark CC 0Remixed from a drawing that was uploaded to Pixabay by DavidZydd
Source Firkin
Pattern generator #161
Noise CC 0A simple example on using clones. You can generate a nice base for a pattern fill quickly with it.
Source Lazur URH