Background pattern 245 (colour 2) #2191
 Green  CC 0

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

Source Firkin

 More Textures
Abstract Ellipses Background Grayscale #814
 Dark  CC 0

Abstract Ellipses Background Grayscale

Source GDJ

Wine [email protected] #34
 Light  CC BY-SA 3.0

Wine cork texture based off a scanned corkboard.

Source Atle Mo

Carbon Fiber [email protected] #106
 Carbon  CC BY-SA 3.0

One more updated pattern. Not really carbon fiber, but it’s the most popular pattern, so I’ll give you an extra choice.

Source Atle Mo

Page ornament #1993
 Dark  CC 0

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

Source Firkin

Brushed Aluminum 1 #1389
 Metal  CC 0

Gamedev - Metal Textures. CC0 License.

Source Davit Masia

Background pattern 202 #2491
 Brown  CC 0

Based on several public domain drawings on Wikimedia Commons. This was formed from a rectangular tile. The tile can be accessed in Inkscape by selecting the rectangle and using shift-alt-i.

Source Firkin

Decorative divider 285 #1847
 Dark  CC 0

From a drawing in 'In an Enchanted Island', William Mallock, 1892.

Source Firkin

Dungeons & Flagons 7 #1423
 Diamond  CC 0

Gamedev - Floors Textures. CC0 License.

Source Davit Masia

Prismatic Triangular Seamless Pattern III With Background #273
 Dark  CC 0

Prismatic Triangular Seamless Pattern III With Background

Source GDJ

Decorative divider #1986
 Dark  CC 0

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

Source Firkin

Prismatic Geometric Pattern Background [email protected] #785
 Noise  CC 0

Prismatic Geometric Pattern Background 2

Source GDJ

Pattern #1476
 Paper  CC 0

Pattern Background, Texture, Photoshop Structure style CC0 texture.

Source Darkmoon1968

Floral background 18 #1834
 Dark  CC 0

emixed from a JPG that was uploaded to Pixabay by Kyotime

Source Firkin

Decorative divider 214 #2315
 Dark  CC 0

From a drawing in 'Kingsdene', Maria Fetherstonehaugh, 1878.

Source Firkin

Stone Wall & Yellow #1520
 Stone  CC 0

Incoming catena. Stone & well. CC0 texture.

Source Unknow

Graphene pattern 2 #2234
 Dark  CC 0

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

Source Firkin

Soft [email protected] #319
 Dark  CC BY-SA 3.0

Pattern #100! A black classic knit-looking pattern.

Source Factorio.us Collective

[email protected] #746
 Gray  CC BY-SA 3.0

Geometric triangles seem to be quite hot these days.

Source Pixeden

Wood 7b #1451
 Wood  CC 0

Gamedev - Wood Textures. CC0 License.

Source Davit Masia

Dark Blue Gray Wallpaper Texture #901
 Stripes  CC BY-SA 3.0

This seamless background image should look nice on websites. It has a dark blue gray texture with vertical stripes, it tiles seamlessly and, like all of the background images here, it's free. So, if you like it, take it!

Source V. Hartikainen

"Gray Stripes", Background Pattern #941
 Stripes  CC BY-SA 3.0

This one is quite simple in design, it consists of vertical stripes layered on top of a seamless texture.

Source V. Hartikainen

Stone Wall & Yellow #1497
 Stone  CC 0

Incoming catena. Stone & well. CC0 texture.

Source Unknow

Floors & Black #1607
 Wall  CC 0

Floors-Tiles. CC0 License.

Source Unknow

Decorative divider 288 #1820
 Dark  CC 0

From a drawing in 'Navigations de Alouys de Cademoste.-La Navigation du Capitaine Pierre Sintre', Alvise da ca da Mosto, 1895.

Source Firkin

Kinda Jean #1062
 Gray  CC BY-SA 3.0

A nice one indeed, but I have a feeling we have it already? If you spot a copy, let me know on Twitter.

Source Graphiste

Vintage pattern #1958
 Grid  CC 0

Formed from a tile based on a drawing from 'Viaggi d'un artista nell'America Meridionale', Guido Boggiani, 1895.

Source Firkin

Noise [email protected] #898
 Paper  CC BY-SA 3.0

Lovely pattern with some good-looking non-random noise lines.

Source Zucx