Sponge A2-1 #2124
 Wall  CC 0

CC0 textures, backgrounds.

Source SliverKnight

 More Textures
White [email protected] #375
 Fabric  CC BY-SA 3.0

Could be paper, could be a Polaroid frame – up to you!

Source Chaos

Soft [email protected] #614
 Fabric  CC BY-SA 3.0

Bumps, highlight and shadows – all good things.

Source Badhon Ebrahim

Prismatic Geometric Pattern [email protected] #787
 Noise  CC 0

Prismatic Geometric Pattern Background

Source GDJ

Purty [email protected] #678
 Wood  CC BY-SA 3.0

You know you love wood patterns, so here’s one more.

Source Richard Tabor

Zig [email protected] #329
 Dark  CC BY-SA 3.0

So tiny, just 7 by 7 pixels – but still so sexy. Ah yes.

Source Dmitriy Prodchenko

Background pattern 223 (colour 3) #2351
 Green  CC 0

Seamless pattern formed from a tile that can be had by selecting the rectangle in Inkscape and using shift-alt-i.

Source Firkin

Floral pattern 6 (colour 5) #2457
 Fabric  CC 0

Alternative colour scheme for the original floral pattern.

Source Firkin

Arches #715
 Light  CC BY-SA 3.0

One more in the line of patterns inspired by Japanese/Asian styles. Smooth.

Source Kim Ruddock

Floors & Yellow #1609
 Wall  CC 0

Floors-Tiles. CC0 License.

Source Unknow

Dark Brown Timber Wall Texture #874
 Wood  CC BY-SA 3.0

A free seamless background texture of "timber wall" (colored in dark brown).

Source V. Hartikainen

Dungeons & Flagons 9 #1425
 Diamond  CC 0

Gamedev - Floors Textures. CC0 License.

Source Davit Masia

Retro Circles Background [email protected] #421
 Dark  CC 0

Retro Circles Background 4

Source GDJ

Background pattern 272 (colour 2) #2056
 Pink  CC 0

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

Source Firkin

Wood Texture 4 #1442
 Wood  CC 0

Gamedev - Wood Textures. CC0 License.

Source Davit Masia

Floors & Dark #1617
 Wall  CC 0

Floors-Tiles. 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

Gold Scale #284
 Light  CC BY-SA 3.0

More Japanese-inspired patterns, Gold Scales this time.

Source Josh Green

Background pattern green #1953
 Green  CC 0

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

Source Firkin

Dark Brown Fabric-Like Texture #963
 Stripes  CC BY-SA 3.0

A seamless striped fabric-like texture colored in a dark reddish brown color.

Source V. Hartikainen

Pyramid #895
 Light  CC BY-SA 3.0

Could remind you a bit of those squares in Super Mario Bros, yeh?

Source Jeff Wall

Cheap Diagonal Fabric #1345
 Gray  CC BY-SA 3.0

Fabric is never out of style.

Source Ufuk Sarp Selçok

Floral background 17 (colour 3) #1849
 Blue  CC 0

Remixed from a JPG that was uploaded to Pixabay by theasad121

Source Firkin

Geometric pattern #2002
 Dark  CC 0

A monochrome pattern from a tile that can be had by selecting the rectangle in Inkscaope and using shift+alt+i

Source Firkin

Offsetsquares #1688
 Paper  CC 0

Paper-Wallpaper. CC0 License.

Source Unknow

Floors & Block #1604
 Wall  CC 0

Floors-Tiles. CC0 License.

Source Unknow

Background Patterns - Emerald #252
 Fabric  CC 0

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

Source Viscious-Speed

Diamond pattern 2 (colour 5) #2264
 Blue  CC 0

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

Source Firkin

[email protected] #664
 Paper  CC BY-SA 3.0

This is so subtle I hope you can see it! Tweak at will.

Source Alexandre Naud

[email protected] #658
 Paper  CC BY-SA 3.0

Nicely crafted paper pattern, although a bit on the large side (500x593px).

Source Blaq Annabiosis