Moulin #1066
 Dark  CC BY-SA 3.0

No relation to Moulin Rouge, but still sexy.

Source Venam

 More Textures
Redox 02 #851
 Light  CC BY-SA 3.0

After 1 comes 2, same but different. You get the idea.

Source Hendrik Lammers

Tex2res1 #721
 Fabric  CC BY-SA 3.0

Number 3 in a series of 5 beautiful patterns. Can be found in colors on the submitter’s website.

Source Janos Koos

Swirl #1323
 Light  CC BY-SA 3.0

Lovely gray circles. What more can you ask for?

Source Uday

Double Lined #51
 Stripes  CC BY-SA 3.0

Horizontal and vertical lines on a light gray background.

Source Adam Anlauf

Background pattern 7 (grey) #206
 Dark  CC 0

Greyscale version of a pattern that came out of playing with the 'slinky' plug-in for Paint.net

Source Firkin

Red Gemstone Tiles #1223
 Red  CC BY-SA 3.0

This tiled background comes in red and consists of tiles that look like gemstones. It is more for blogs or social profiles, I think.

Source V. Hartikainen

Plywood Web Background #871
 Wood  CC BY-SA 3.0

Plywood Web Background background image for use in web design.

Source V. Hartikainen

Crackled Cement Wall #1270
 Wall  CC 0

Zero CC tileable Crackled Cement (streaks) texture, photographed and made by me. CC0

Source Sojan Janso

Abstract sun pattern #2260
 Yellow  CC 0

Remixed from a PNG on WPClipart.com.

Source Firkin

White Texture #131
 Light  CC BY-SA 3.0

Not the most creative name, but it’s a good all-purpose light background.

Source Dmitry

Knitted Sweater #1097
 Light  CC BY-SA 3.0

Can never have too many knitting patterns, especially as nice as this.

Source Victoria Spahn

[email protected] #134
 Light  CC BY-SA 3.0

This reminds me of Game Cube. A nice light 3D cube pattern.

Source Sander Ottens

Vintage tile background #2248
 Brown  CC 0

A background formed from an image of an old tile on the New York Metropolitan Museum of Art website. To get the base tile, select the rectangle in Inkscape and use shift-alt-i.

Source Firkin

Page ornament 22 #2358
 Dark  CC 0

From a drawing in 'A Rolling Stone. A tale of wrongs and revenge', John Hartley, 1878.

Source Firkin

Floral Seamless Pattern Background #261
 Fabric  CC 0

PDP

Source GDJ

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

The basic shapes never get old. Simple triangle pattern.

Source Atle Mo

Acid Rot & Black #1663
 Metal  CC 0

Metal-Rusty. CC0 License.

Source Unknow

Dark [email protected] #620
 Dark  CC BY-SA 3.0

Continuing the geometric trend, here is one more.

Source Mike Warner

Arrows decorative divider #1907
 Dark  CC 0

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

Source Firkin

[email protected] #766
 Light  CC BY-SA 3.0

The act or state of corrugating or of being corrugated, a wrinkle; fold; furrow; ridge.

Source Anna Litvinuk

Decorative divider 245 #2079
 Dark  CC 0

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

Source Firkin

Grunge Website Background #1122
 Grunge  CC BY-SA 3.0

A seamlessly tile-able grunge background image.

Source V. Hartikainen

Leopard Skin Pattern #1120
 Leather  CC BY-SA 3.0

A seamless pattern of leopard skin. It should look nice as a background element on web pages.

Source V. Hartikainen

Background pattern [email protected] #562
 Dark  CC 0

Background pattern 104

Source Firkin

Tessellation 16 (colour 2) #2214
 Colorful  CC 0

The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.

Source Firkin