Double Lined #51
 Stripes  CC BY-SA 3.0

Horizontal and vertical lines on a light gray background.

Source Adam Anlauf

 More Textures
Mix & Black Pattern #1632
 Metal  CC 0

Metal-Plain or Painted. CC0 License.

Source Unknow

"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

Retro Squares Background 8 #398
 Noise  CC 0

Retro Squares Background 8

Source GDJ

Psychedelic Geometric Background No Black #382
 Noise  CC 0

Psychedelic Geometric Background No Black

Source GDJ

Seamless Gray Stone Background #1028
 Stone  CC BY-SA 3.0

This background image has seamless texture that resembles a surface of gray stone.

Source V. Hartikainen

Retro Circles Background [email protected] #436
 Dark  CC 0

Retro Circles Background 8

Source GDJ

Leafy pattern 7 #1828
 Dark  CC 0

Remixed from an image that was uploaded to Pixabay by CatherineClennan

Source Firkin

[email protected] #1114
 Light  CC BY-SA 3.0

Number five from the same submitter, makes my job easy.

Source Dima Shiper

Vintage pattern 2 #2295
 Yellow  CC 0

Inspired by a pattern seen on a public domain image of a very old tile. To get the unit cell, select the rectangle in Inkscape and use shift+alt+i.

Source Firkin

Background pattern 314 (colour 3) #1837
 Green  CC 0

The square tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i

Source Firkin

Paper 2 #2113
 Paper  CC 0

CC0 textures, backgrounds.

Source SliverKnight

SubtleNet #855
 Light  CC BY-SA 3.0

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

Source Designova

French Stucco #697
 Paper  CC BY-SA 3.0

Fabric-ish patterns are close to my heart. French Stucco to the rescue.

Source Christopher Buecheler

Floral background 21 #1785
 Dark  CC 0

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

Source Firkin

Leafy pattern 7 (colour 2) #1826
 Blue  CC 0

Alternative colour scheme.

Source Firkin

[email protected] #973
 Light  CC BY-SA 3.0

Super detailed 16×16 tile that forms a beautiful pattern of straws.

Source Pavel

Decorative divider 279 #1889
 Dark  CC 0

Remixed from a drawing that was uploaded to Pixabay by captenpub.

Source Firkin

Padded #61
 Dark  CC BY-SA 3.0

A beautiful dark padded pattern, like an old classic sofa.

Source Chris Baldie

Paper [email protected] #16
 Paper  CC BY-SA 3.0

A slightly grainy paper pattern with small horizontal and vertical strokes.

Source Atle Mo

Diamonds Are Forever #183
 Diamond  CC BY-SA 3.0

Sharp diamond pattern. A small 24x18px tile.

Source Tom Neal

"Brown Stone Wall" #1026
 Stone  CC BY-SA 3.0

A free seamless background texture that looks like a brown stone wall.

Source V. Hartikainen

Background patter 294  #1920
 Dark  CC 0

Remixed from a drawing in 'Works. Popular edition', John Ruskin, 1886.

Source Firkin

Tex2res4 #717
 Dark  CC BY-SA 3.0

Number 1 in a series of 5 beautiful patterns. Can be found in colors on the submitter’s website.

Source Janos Koos

Circular frame 26 #1711
 Dark  CC 0

Derived from an image that was uploaded to Pixabay by Darkmoon1968

Source Firkin

Starry background 2 #1935
 Dark  CC 0

Inspired by a design seen on Pixabay

Source Firkin