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

 More Textures
Stamped Dots On Metal #1083
 Metal  CC BY-SA 3.0

A dark metallic background with a pattern of stamped dots. Here's a dark "metallic" background pattern for you.

Source V. Hartikainen

Concretia 6 #1413
 Gray  CC 0

Gamedev - Concrete Textures. CC0 License.

Source Davit Masia

Prismatic Geometric Tessellation Pattern 4 No Background #557
 Noise  CC 0

Prismatic Geometric Tessellation Pattern 4 No Background

Source GDJ

Stone Wall & Dark #1543
 Stone  CC 0

Incoming catena. Stone & well. CC0 texture.

Source Unknow

Retro Squares Background 2 #416
 Noise  CC 0

Retro Squares Background 2

Source GDJ

Background pattern 320 #1830
 Pink  CC 0

Formed by distorting a JPG from PublicDomainPictures

Source Firkin

Dark [email protected] #122
 Dark  CC BY-SA 3.0

Small dots with minor circles spread across to form a nice mosaic.

Source John Burks

Specular & Gray Pattern #1641
 Metal  CC 0

Metal-Processed. CC0 License.

Source Unknow

Paper [email protected] #22
 Paper  CC BY-SA 3.0

New paper pattern with a slightly organic feel to it, using some thin threads.

Source Atle Mo

Subtle [email protected] #752
 Stripes  CC BY-SA 3.0

Vertical lines with a bumpy, yet crisp, feel to it.

Source Raasa

Corrosive Dark #1660
 Metal  CC 0

Metal-Rusty. CC0 License.

Source Unknow

Dark Matter #601
 Dark  CC BY-SA 3.0

The name is totally random, but hey, it sounds good.

Source Atle Mo

Navy #984
 Dark  CC BY-SA 3.0

It was called Navy Blue, but I made it dark. You know, the way I like it.

Source Ethan Hamilton

Dark Wall #817
 Dark  CC BY-SA 3.0

Just to prove my point, here is a slightly modified dark version.

Source Atle Mo

Brick #1377
 Wall  CC 0

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

Source Linolafett

texture hearts pattern #242
 Noise  CC 0

A red heart background texture.

Source GDJ

Background pattern 207 #2466
 Yellow  CC 0

A seamless pattern created from a square tile. To get the tile, select the rectangle in Inkscape and use shift+alt+i.

Source Firkin

Subtle Grunge #1040
 Light  CC BY-SA 3.0

A heavy hitter at 400x400px, but lovely still.

Source Breezi

Food and drink design #1897
 Dark  CC 0

Colour version that is close to the original drawing uploaded to Pixabay by pencilparker.

Source Firkin

Light Gray Paper With Horizontal Lines #904
 Stripes  CC BY-SA 3.0

A seamless light gray paper texture with horizontal double lines.

Source V. Hartikainen

Carbon Fiber #3
 Carbon  CC BY-SA 3.0

A dark pattern made out of 3×3 circles and a 1px shadow. This works well as a carbon texture or background.

Source Atle Mo

[email protected] #186
 Light  CC BY-SA 3.0

One more sharp little tile for you. Subtle circles this time.

Source Blunia

Background pattern 252 #2162
 Dark  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

Dungeons & Flagons 7 #1423
 Diamond  CC 0

Gamedev - Floors Textures. CC0 License.

Source Davit Masia

Triangular Psychosis 3 #235
 Noise  CC 0

A colorful triangular background, variation 3.

Source GDJ

PW Pattern #1142
 Light  CC BY-SA 3.0

Vertical and horizontal lines form some cubes.

Source Peax