Background pattern 289 #1937
 Orange  CC 0

To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.

Source Firkin

 More Textures
"Black Stripes", Background Pattern #966
 Stripes  CC BY-SA 3.0

A light gray fabric pattern with faded vertical stripes.

Source V. Hartikainen

Background pattern 215 #2371
 Brown  CC 0

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

Source Firkin

Crow and bird pattern #1965
 Dark  CC 0

CC0 remixed from a drawing. Walter Crane, 1914, Firkin.

Source SliverKnight

Background pattern #1941
 Brown  CC 0

Formed by heavily distorting part of a an image of a fish uploaded to Pixabay by GLady

Source Firkin

Stone Wall & Yellow #1552
 Stone  CC 0

Incoming catena. Stone & well. CC0 texture.

Source Unknow

Dark Denim #29
 Dark  CC BY-SA 3.0

A dark denim looking pattern. 145×145 pixels.

Source Atle Mo

Fabric pattern (colour 3) #2400
 Fabric  CC 0

Alternative colour scheme. Not a pattern for fabrics, but one produced from a jpg of a stack of fabric items that was posted on Pixabay. The tile that this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i.

Source Firkin

Aged Paper Background Tile #1074
 Paper  CC BY-SA 3.0

A seamless background tile of aged paper with shabby look.

Source V. Hartikainen

Project Papper #119
 Paper  CC BY-SA 3.0

Light square grid pattern, great for a “DIY projects” sort of website, maybe?

Source Rafael Almeida

Background pattern 246 (colour 5) #2182
 Colorful  CC 0

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

Source Firkin

Prismatic Basic Pattern 2 No [email protected] #448
 Noise  CC 0

Prismatic Basic Pattern 2 No Background

Source GDJ

The Black [email protected] #770
 Dark  CC BY-SA 3.0

Super dark, crisp and detailed. And a Kill Bill reference.

Source Badhon Ebrahim

Brick #1373
 Wall  CC 0

Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!

Source Linolafett

Soft Wallpaper #95
 Wall  CC BY-SA 3.0

Coming in at 666x666px, this is an evil big pattern, but nice and soft at the same time.

Source Atle Mo

Prismatic Groovy Concentric [email protected] #450
 Noise  CC 0

Prismatic Groovy Concentric Background

Source GDJ

First Aid Kit #701
 Fabric  CC BY-SA 3.0

No, not the band but the pattern. Simple squares in gray tones, of course.

Source Atle Mo

Abstract Geometric Monochrome Pattern Prismatic No Background #385
 Noise  CC 0

Abstract Geometric Monochrome Pattern Prismatic No Background

Source GDJ

Sine wave background 2 #1734
 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

Solid #845
 Gray  CC BY-SA 3.0

A mid-tone gray pattern with some cement looking texture.

Source Hendrik Lammers

Transparent Square [email protected] #299
 Grid  CC BY-SA 3.0

The first pattern on here using opacity. Try it on a site with a colored background, or even using mixed colors.

Source Nathan Spady

Decorative divider 218 #2232
 Dark  CC 0

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

Source Firkin

Leaves #1669
 Paper  CC 0

Paper-Wallpaper. CC0 License.

Source Unknow

Dirty Old Black Shirt #853
 Dark  CC BY-SA 3.0

Used in small doses, this could be a nice subtle pattern. Used on a large surface, it’s dirty!

Source Paul Reulat

Colorful Floral Background [email protected] #488
 Dark  CC 0

Colorful Floral Background 2

Source GDJ

White Wall [email protected] #1149
 Wall  CC BY-SA 3.0

This one needs to be used in small areas; you can see it repeat.

Source Luca

Leafy design 18 #1788
 Dark  CC 0

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

Source Firkin