"Black Chains", Gloomy Background #1082
 Metal  CC BY-SA 3.0

A repeating gloomy background image. This one consists of a pattern of black chains layered on top of a dark textured background.

Source V. Hartikainen

 More Textures
Pewter & Gray #1637
 Metal  CC 0

Metal-Plain or Painted. CC0 License.

Source Unknow

Plain & Wood #1356
 Wood  CC 0

CC0 for Free, hope you like it.

Source Yethiel

Dark Brown Leather Texture, Seamless Tile #1092
 Leather  CC BY-SA 3.0

The texture of this background image has some similarities with leather, and it's colored in a dark brown color. So, if you are looking for a dark brown background image for your website, this may be an option for you.

Source V. Hartikainen

Prismatic Triangular Background Design Mark II [email protected] #788
 Dark  CC 0

Prismatic Triangular Background Design Mark II 5

Source GDJ

Background pattern 8 (colour) #211
 Noise  CC 0

Colour version of a pattern that came out of playing with the 'light rays' plug-in for Paint.net

Source Firkin

Assault #827
 Dark  CC BY-SA 3.0

Dark, crisp and sort of muddy one.

Source Hendrik Lammers

Floral background 18 (negative) #1832
 Dark  CC 0

Negative version of the original

Source Firkin

Shapes pattern 2 (colour 3) #2239
 Blue  CC 0

A background made up of shapes.

Source Firkin

Background pattern 227 (colour 5) #2310
 Colorful  CC 0

A seamless background drawn in Paint.net and vectorised with Vector Magic. The starting point was a photograph of drinking straws from Pixabay.

Source Firkin

45-Degree [email protected] #2
 Fabric  CC BY-SA 3.0

Medium gray fabric pattern with 45-degree lines going across.

Source Atle Mo

Wall & Red #1363
 Wall  CC 0

Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!

Source Linolafett

Black [email protected] #56
 Dark  CC BY-SA 3.0

Black paper texture, based on two different images.

Source Atle Mo
Based from Kindle

fishnet seamless pattern #2483
 Grid  CC 0

The image is a seamless pattern of a fishnet.

Source Yamachem

Dark [email protected] #130
 Dark  CC BY-SA 3.0

You were craving more leather, so I whipped this up by scanning a leather jacket.

Source Atle Mo

Prismatic Polka Dots 3 No Background #528
 Noise  CC 0

Prismatic Polka Dots 3 No Background

Source GDJ

Grilled [email protected] #582
 Fabric  CC BY-SA 3.0

You could get a bit dizzy from this one, but it might come in handy.

Source Dertig Media

Blizzard #663
 Paper  CC BY-SA 3.0

This is so subtle I hope you can see it! Tweak at will.

Source Alexandre Naud

"Wide Stripe Wallpaper", Seamless Pattern #970
 Stripes  CC BY-SA 3.0

A seamless pattern with wide vertical stripes colored in pale yellow.

Source V. Hartikainen

[email protected] #279
 Paper  CC BY-SA 3.0

A good starting point for a cardboard pattern. This would work well in a variety of colors.

Source Atle Mo

Nami #575
 Dark  CC BY-SA 3.0

Not sure if this is related to the Nami you get in Google image search, but hey, it’s nice!

Source Dertig Media

Green Wall #1268
 Wall  CC 0

Zero CC bark from fur tree tileable texture, photographed and made by me. CC0

Source Sojan Janso

Prismatic Groovy Concentric Background No [email protected] #452
 Noise  CC 0

Prismatic Groovy Concentric Background No Black

Source GDJ

Prismatic Geometric Pattern Variation 2 With [email protected] #472
 Noise  CC 0

Prismatic Geometric Pattern Variation 2 With Background

Source GDJ

Stone Wall & Dark #1584
 Stone  CC 0

Incoming catena. Stone & well. CC0 texture.

Source Unknow

Background pattern 252 (colour 5) #2158
 Light  CC 0

Recreated from a pattern found in 'Az Osztrák-Magyar Monarchia irásban és képben', 1882. To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.

Source Firkin

Crackled Wall #1272
 Wall  CC 0

Zero CC tileable ground cracked, crackled, texture, made by me.

Source Sojan Janso

Zig-zag pattern 6 #2413
 Grid  CC 0

A seamless pattern based on a square tile that can be retrieved in Inkscape by selecting the rectangle and using shift-alt-i.

Source Firkin

Abstract Ellipses Background Grayscale #814
 Dark  CC 0

Abstract Ellipses Background Grayscale

Source GDJ

Dungeons & Flagons 8 #1424
 Diamond  CC 0

Gamedev - Floors Textures. CC0 License.

Source Davit Masia