Dark Fish Skin #1048
 Dark  CC BY-SA 3.0

It almost looks a bit blurry, but then again, so are fishes.

Source Petr Šulc

 More Textures
Floral divider 3 #1751
 Dark  CC 0

From a drawing in 'Resa i Afrika, genom Angola, Ovampo och Damaraland', P. Moller, 1899.

Source Firkin

"Dirty Paper", Seamless Background #1059
 Paper  CC BY-SA 3.0

A seamless background colored in pale orange. It has a paper like texture with diagonal grid pattern.

Source V. Hartikainen

Sakura Blossoms Background #389
 Noise  CC 0

Sakura Blossoms Background

Source GDJ

Dark Metallic Background Pattern #1088
 Metal  CC BY-SA 3.0

A dark background pattern/texture of a dimpled metal plate.

Source V. Hartikainen

Wood 6b #1450
 Wood  CC 0

Gamedev - Wood Textures. CC0 License.

Source Davit Masia

Background pattern 19 (black) #203
 Dark  CC 0

A seamless pattern the starting point for which was a 'rainbow twist' texture in Paint.net.

Source Firkin

Background pattern 227 (colour 4) #2311
 Green  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

Decorative divider 292 #1774
 Dark  CC 0

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

Source Firkin

Retro Squares Background [email protected] #799
 Dark  CC 0

Retro Squares Background 5

Source GDJ

Grass #1278
 Green  CC 0

Zero CC tileable grass texture, photographed and made by me. CC0

Source Sojan Janso

Floral background 21 (colour) #1784
 Dark  CC 0

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

Source Firkin

Stone Wall & Yellow #1488
 Stone  CC 0

Incoming catena. Stone & well. CC0 texture.

Source Unknow

[email protected] #1151
 Dark  CC BY-SA 3.0

Tweed is back in style – you heard it here first. Also, the @2X version here is great!

Source Simon Leo

Block Well #1697
 Colorful  CC 0

Background Wall, Art Abstract, Block Well & CC0 texture.

Source Ractapopulous

fence pattern #2487
 Grid  CC 0

The image is the remix of "wire-mesh fence seamless pattern" .This is a more minute version of it.Sorry for the file size.Using path>difference in Inkscape, I will cut out any silhouette from this pattern and create a "meshed silhouette".

Source Yamachem

Subtle Striped Brown Background Pattern #940
 Stripes  CC BY-SA 3.0

Here's a brown background pattern with subtle stripes. I hope you'll like the color. If not, feel free to change it using an image editor, if you know how of course. Personally, I'm using GIMP to create these backgrounds.

Source V. Hartikainen

Decorative divider 219 #2231
 Dark  CC 0

Remixed from a drawing in 'Maidenhood; or, the Verge of the Stream', Laura Jewry, 1876.

Source Firkin

[email protected] #357
 Light  CC BY-SA 3.0

It’s a hole, in a pattern. On your website. Dig it!

Source Josh Green

Contemporary China #1337
 Light  CC BY-SA 3.0

Old China with a modern twist.

Source Adam Charlts

Cincinnati tablet 2 #2146
 Dark  CC 0

Remixed from a drawing in 'Prehistoric Man: researches into the origin of civilisation in the old and the new world', Daniel Wilson, 1876.

Source Firkin

Seamless tile 4 #1812
 Red  CC 0

Not strictly seamless in that opposite edges are not identical. But they do marry up to make an interesting pattern

Source Firkin

Background pattern 331 (version 2) #1745
 Pink  CC 0

Derived from an image that was uploaded to Pixabay by TheDigitalArtist

Source Firkin

Background pattern 302 (colour 2) #1887
 Green  CC 0

Alternative colour scheme to the original.

Source Firkin

Cube & Dark #1627
 Dark  CC 0

Manmade & Civilisation-Tech-Lights. CC0 License.

Source Unknow

Grey Washed [email protected] #1129
 Wall  CC BY-SA 3.0

This is a semi-dark pattern, sort of linen-y.

Source Sagive SEO

"Dark Red Canvas", Seamless Web Texture #1221
 Red  CC BY-SA 3.0

A free seamless background image with a texture of dark red "canvas". It should look very nice on web sites.

Source V. Hartikainen

Honey I’m Subtle #1038
 Gray  CC BY-SA 3.0

A mid-gray hexagon pattern.

Source Alex M. Balling

Green Background Pattern with Warped Vertical Stripes #968
 Stripes  CC BY-SA 3.0

A green background pattern with warped vertical stripes and a grunge look.

Source V. Hartikainen

Background pattern 9 (B&W) #212
 Dark  CC 0

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

Source Firkin