Tree Bark #1182
 Light  CC BY-SA 3.0

This one is something special. I’d call it a flat pattern, too. Very well done, sir!

Source GetDiscount

 More Textures
Diamond Upholstery #767
 Diamond  CC BY-SA 3.0

A re-make of the Gradient Squares pattern.

Source Dimitar Karaytchev

Gold [email protected] #285
 Light  CC BY-SA 3.0

More Japanese-inspired patterns, Gold Scales this time.

Source Josh Green

Prismatic Floral Background No Black #475
 Light  CC 0

Prismatic Floral Background No Black

Source GDJ

AZ Subtle #990
 Light  CC BY-SA 3.0

The A – Z of Subtle? Up to you.

Source Anli

[email protected] #1210
 Dark  CC BY-SA 3.0

Everyone needs some stardust. Sprinkle it on your next project.

Source Atle Mo

Cross Scratches #625
 Paper  CC BY-SA 3.0

Subtle scratches on a light gray background.

Source Andrey Ovcharov

PW [email protected] #1143
 Light  CC BY-SA 3.0

Vertical and horizontal lines form some cubes.

Source Peax

Rushes divider #2152
 Dark  CC 0

From a drawing in 'Hundert Jahre in Wort und Bild', S. Stefan, 1899.

Source Firkin

Metal & Red #1655
 Metal  CC 0

Metal-Rusty. CC0 License.

Source Unknow

[email protected] #279
 Paper  CC BY-SA 3.0

A good starting point for a cardboard pattern. This would work well in a variety of colors.

Source Atle Mo

Mooning #1140
 Gray  CC BY-SA 3.0

The classic subtle pattern. Sort of wall/brick looking. Or moon-looking?

Source Joel Klein

Leaded glass background (colour 3) #2052
 Colorful  CC 0

Seamless pattern the tile.

Source Firkin

Vintage Elegant Floral Background #257
 Fabric  CC 0

PDP

Source GDJ

Background pattern 9 (greyscale) #213
 Dark  CC BY-SA 3.0

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

Source Firkin

Leaves #1669
 Paper  CC 0

Paper-Wallpaper. CC0 License.

Source Unknow

Random Grey [email protected] #70
 Stripes  CC BY-SA 3.0

Stefan is hard at work, this time with a funky pattern of squares.

Source Stefan Aleksić

Background Patterns - Lava #251
 Fabric  CC 0

If you want png files of this u can download them here : viscious-speed.deviantart.com/gallery/27635117

Source Viscious-Speed

Wavy background #2016
 Pink  CC 0

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

Source Firkin

Background pattern 221 (colour) #2346
 Yellow  CC 0

A seamless pattern formed from a tile made from page ornament 22. To get the tile, select the rectangle in Inkscape and use shift+alt+i.

Source Firkin

Retro Circles Background 7 No [email protected] #434
 Unknow  CC 0

Retro Circles Background 7 No Black

Source GDJ

Diamond pattern 2 (colour 3) #2266
 Colorful  CC 0

From a tile that 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

"Rusted Metal", Grunge Background #1087
 Metal  CC BY-SA 3.0

A rusty grunge background for websites. Feel free to use it in your site's theme.

Source V. Hartikainen

Diamond pattern (colour 2) #2284
 Green  CC 0

From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.

Source Firkin

[email protected] #277
 Dark  CC BY-SA 3.0

The perfect pattern for all your blogs about type, or type-related matters.

Source Atle Mo

Background pattern 18 #202
 Dark  CC 0

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

Source Firkin

Prismatic Floral Pattern 3 Variation 3 No Background #386
 Noise  CC 0

Prismatic Floral Pattern 3 Variation 3 No Background

Source GDJ

Bamboo Background Pattern #1330
 Green  CC BY-SA 3.0

This background pattern looks like bamboo to me. Feel free to download it for your website (for your blog perhaps?).

Source V. Hartikainen

Square Flower #1691
 Paper  CC 0

Paper-Wallpaper. CC0 License.

Source Unknow

Retro Circles Background 5 No Black #426
 Noise  CC 0

Retro Circles Background 5 No Black

Source GDJ