Retro Circles Background 5 #424
 Noise  CC 0

Retro Circles Background 5

Source GDJ

 More Textures
Circular frame 25 #1712
 Dark  CC 0

Derived from a PNG that was uploaded to Pixabay by nutkitten

Source Firkin

Prismatic Dots Background 5 #509
 Noise  CC 0

Prismatic Dots Background 5

Source GDJ

Stone Wall & Purple #1566
 Stone  CC 0

Incoming catena. Stone & well. CC0 texture.

Source Unknow

Brushed Aluminum 4 #1392
 Metal  CC 0

Gamedev - Metal Textures. CC0 License.

Source Davit Masia

Decorative divider #1986
 Dark  CC 0

Remixed from a drawing in 'Chambéry à la fin du XIVe siècle', Timoleon Chapperon, 1863.

Source Firkin

Background pattern 225 (colour 5) #2323
 Blue  CC 0

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

Source Firkin

Background pattern 289 (colour 2) #1936
 Red  CC 0

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

Source Firkin

Fleur #1675
 Paper  CC 0

Paper-Wallpaper. CC0 License.

Source Unknow

Wood 11 #1456
 Wood  CC 0

Gamedev - Wood Textures. CC0 License.

Source Davit Masia

Crossword #1301
 Light  CC BY-SA 3.0

Borderline too subtle. Yes, I said it.

Source Ideawebme

White Well & Fissure #1701
 Wall  CC 0

Background Wall, Art Abstract, white Well & CC0 texture.

Source Ractapopulous

Floral design 98 #1783
 Dark  CC 0

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

Source Firkin

Floral design 71 #2429
 Dark  CC 0

From a drawing in 'From Snowdon to the Sea. Striking stories of North and South Wales', Marie Trevelyan, 1895.

Source Firkin

Green [email protected] #92
 Dark  CC BY-SA 3.0

The green fibers pattern will work very well in grayscale as well.

Source Matteo Di Capua

Background pattern 239 #2217
 Red  CC 0

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

Source Firkin

Triangular Psychosis 3 #235
 Noise  CC 0

A colorful triangular background, variation 3.

Source GDJ

Subtle [email protected] #926
 Light  CC BY-SA 3.0

Super subtle indeed, a medium gray pattern with tiny dots in a grid.

Source Designova

Light Wool #695
 Grid  CC BY-SA 3.0

Submitted as a black pattern, I made it light and a few steps more subtle.

Source Andy

HIXS [email protected] #610
 Dark  CC BY-SA 3.0

Heavy depth and shadows here, but might work well on some mobile apps.

Source Damian Rivas

Cover Pink #1284
 Pink  CC 0

Zero CC tillable hard cover red book with X shape marks. Scanned and made by me.

Source Sojan Janso

Fruit decorative divider #1911
 Colorful  CC 0

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

Source Firkin

Floral background 2 #380
 Wall  CC 0

Background formed from the original with an emboss effect

Source GDJ

Floral flourish #1816
 Dark  CC 0

Derived from a JPG that was uploaded to Pixabay by ractapopulous

Source Firkin

Light Gray Fabric Pattern With Faded Stripes #965
 Stripes  CC BY-SA 3.0

A light gray fabric pattern with faded vertical stripes.

Source V. Hartikainen

Background pattern 309 (colour 3) #1864
 Red  CC 0

Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.

Source Firkin

Floral background 18 #1834
 Dark  CC 0

emixed from a JPG that was uploaded to Pixabay by Kyotime

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

Sponge A2-3 #2126
 Wall  CC 0

CC0 textures, backgrounds.

Source SliverKnight

Floral design 87 #1886
 Dark  CC 0

From a drawing in 'Cowdray: the history of a great English House', Julia Roundell, 1884.

Source Firkin

Background pattern 246 #2186
 Red  CC 0

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

Source Firkin