Octagonal frame #2355
 Dark  CC 0

Formed in Paint.net and vectorised in Vector Magic.

Source Firkin

 More Textures
Concretia 1 #1408
 Gray  CC 0

Gamedev - Concrete Textures. CC0 License.

Source Davit Masia

Subtle Freckles #89
 Light  CC BY-SA 3.0

This is so subtle: We’re talking 1% opacity. Get your squint on!

Source Atle Mo

Bark 1 Roughness #1469
 Paper  CC 0

Bark style CC0 texture.

Source StruffelProductions

Little [email protected] #688
 Light  CC BY-SA 3.0

The basic shapes never get old. Simple triangle pattern.

Source Atle Mo

Winding Stripes Background Pattern #1164
 Fabric  CC BY-SA 3.0

A dark brown fabric-like background texture with seamless pattern of winding stripes.

Source V. Hartikainen

Background pattern 253 #2153
 Brown  CC 0

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

Source Firkin

Decorative divider 277 #1906
 Colorful  CC 0

Vector version of a png that was uploaded to Pixabay by pencilparker

Source Firkin

Floral background #1976
 Dark  CC 0

Remixed from a drawing in 'Analecta Eboracensia', Thomas Widdrington, 1897.

Source Firkin

Floral background #1980
 Brown  CC 0

Remixed from a drawing in 'Line and form", Walter Crane, 1914.

Source Firkin

Background pattern 245 (colour 3) #2190
 Blue  CC 0

This was formed by distorting an image of a background on Pixabay.

Source Firkin

Wavy background #2017
 Green  CC 0

A seamless pattern from a tile drawn in Paint.net and vectorised in Vector Magic

Source Firkin

SubtleNet #855
 Light  CC BY-SA 3.0

You can never get enough of these tiny pixel patterns with sharp lines.

Source Designova

Little [email protected] #74
 Light  CC BY-SA 3.0

Subtle grunge and many little pluses on top.

Source Atle Mo

Floral background 19 #1833
 Dark  CC 0

Remixed from a JPG that was uploaded to Pixabay by Osckar

Source Firkin

Light Blue Background Pattern #1161
 Grid  CC BY-SA 3.0

This light blue background pattern is quite pleasing to the eye, it consists of a tiny rough grid pattern, which is seamless by design. That's it, if you like the color, you can use this seamless pattern in a web design without making any further modifications to it.

Source V. Hartikainen

Floral design #1985
 Dark  CC 0

Remixed from a drawing in 'Line and form', Walter Crane, 1914.

Source Firkin

Background pattern 245 (colour 4) #2189
 Yellow  CC 0

This was formed by distorting an image of a background on Pixabay.

Source Firkin

Subtle [email protected] #1041
 Light  CC BY-SA 3.0

A heavy hitter at 400x400px, but lovely still.

Source Breezi

Gold Wall & Black #1251
 Wall  CC 0

Zerro CC tillable texture of stones photographed and made by me. CC0

Source Sojan Janso

Squairy #1138
 Light  CC BY-SA 3.0

Super tiny dots and all sorts of great stuff.

Source Newbury

Use Your [email protected] #918
 Dark  CC BY-SA 3.0

A dark one with geometric shapes and dotted lines.

Source Mohawk Studios

Tall plant #1818
 Dark  CC 0

From a drawing in 'The Christian Year', John Keble, 1880

Source Firkin

Lock and key pattern #1884
 Yellow  CC 0

Seamless pattern formed from a key and lock.

Source Firkin

More Rough Wood 7 #1433
 Wood  CC 0

Gamedev - Wood Textures. CC0 License.

Source Davit Masia

Desert Camo Print #255
 Fabric  CC 0

Here's a camo print with more tan and less green, such as might be used in a desert scenario. This is tileable, so it can be used as a wallpaper or background.

Source Eady

Background pattern 261 #2076
 Dark  CC 0

Inspired by a pattern found in 'A General History of Hampshire, or the County of Southampton, including the Isle of Wight', Bernard Woodwood, 1861

Source Firkin

Prismatic Abstract Geometric Background 4 No [email protected] #442
 Dark  CC 0

Prismatic Abstract Geometric Background 4 No Black

Source GDJ

Background pattern 312 (colour 2) #1859
 Red  CC 0

Alternative colour scheme

Source Firkin