Brushed Aluminum 6 #1394
 Metal  CC 0

Gamedev - Metal Textures. CC0 License.

Source Davit Masia

 More Textures
Seamless Canvas (Pale Brown) #1165
 Fabric  CC BY-SA 3.0

A seamless canvas texture for using as background on websites. Colored in pale tones of brown.

Source V. Hartikainen

Stone Wall & Yellow #1570
 Stone  CC 0

Incoming catena. Stone & well. CC0 texture.

Source Unknow

Stone Wall & Yellow #1554
 Stone  CC 0

Incoming catena. Stone & well. CC0 texture.

Source Unknow

Background pattern 336 (colour 3) #1719
 Blue  CC 0

Formed by distorting the inside front cover of 'Diversæ insectarum volatilium : icones ad vivum accuratissmè depictæ per celeberrimum pictorem', Jacob Hoefnagel, 1630.

Source Firkin

Chain background #2063
 Dark  CC 0

Remixed from a drawing in 'Canadian forest industries July-December', 1915

Source Firkin

Wavy background #2019
 Colorful  CC 0

CC0 and a seamless pattern from a tile drawn in Paint.net .

Source SliverKnight

Square ornament 41 #2085
 Dark  CC 0

Remixed from a drawing in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.

Source Firkin

Elegant Grid #316
 Wall  CC BY-SA 3.0

This is a hot one. Small, sharp and unique.

Source GraphicsWall

Decorative divider 208 #2366
 Dark  CC 0

Derived from elements found in a floral ornament drawing on Pixabay.

Source Firkin

Background pattern 215 (colour 3) #2369
 Pink  CC 0

A grid of squares with green colours. Since the colours are randomly distributed it is automatically seamless.

Source Firkin

Paper yellowish 1 #2118
 Paper  CC 0

CC0 textures, backgrounds.

Source SliverKnight

Skulls #1302
 Yellow  CC BY-SA 3.0

Not subtle at all, but man – the craftsmanship is ace!

Source Adam

Cross [email protected] #48
 Dark  CC BY-SA 3.0

Nice and simple crossed lines in dark gray tones.

Source Stefan Aleksić

Background pattern 277 (colour) #2031
 Orange  CC 0

A background pattern inspired by designs seen in 'Burghley. The Life of William Cecil', William Charlton, 1857.

Source Firkin

Retro Squares Background [email protected] #798
 Noise  CC 0

Retro Squares Background 6

Source GDJ

Decorative divider 233 #2145
 Dark  CC 0

From a drawing in 'Hyde Park from Domesday-Book to date', John Ashton, 1896.

Source Firkin

Gears pattern 4 (colour 2) #2237
 Red  CC 0

A seamless pattern formed from gears.

Source Firkin

Cutcube #629
 Diamond  CC BY-SA 3.0

Cubes, geometry, 3D. What’s not to love?

Source Michael Atkins

Brushed Aluminum 8 #1396
 Dark  CC 0

Gamedev - Metal Textures. CC0 License.

Source Davit Masia

Stone Wall & Yellow #1489
 Stone  CC 0

Incoming catena. Stone & well. CC0 texture.

Source Unknow

Floral design 99 #1776
 Dark  CC 0

From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.

Source Firkin

Background pattern 252 (colour 2) #2156
 Brown  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

Flower 193 #1794
 Green  CC 0

From a drawing in 'Prose and Verse ', William Linton, 1836.

Source Firkin

Fabric (Plaid) #591
 Fabric  CC BY-SA 3.0

You know you can’t get enough of these linen-fabric-y patterns.

Source James Basoo

Kuji #689
 Fabric  CC BY-SA 3.0

An interesting and original pattern from Josh.

Source Josh Green

Paper 2 #2113
 Paper  CC 0

CC0 textures, backgrounds.

Source SliverKnight

Sine wave background #1735
 Dark  CC 0

The tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i

Source Firkin

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

Background pattern 308 (colour 3) #1870
 Colorful  CC 0

Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.

Source Firkin