Green Fibers #91
 Dark  CC BY-SA 3.0

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

Source Matteo Di Capua

 More Textures
Wall #1249
 Wall  CC 0

Zerro CC tillable texture of stones photographed and made by me. CC0

Source Sojan Janso

Decorative divider 282 #1857
 Dark  CC 0

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

Source Firkin

Psychedelic Geometric [email protected] #813
 Noise  CC 0

Psychedelic Geometric Background.

Source GDJ

Textured Paper #1130
 Paper  CC BY-SA 3.0

You know I love paper patterns. Here is one from Stephen. Say thank you!

Source Stephen Gilbert

Background pattern 227 (colour 5) #2310
 Colorful  CC 0

A seamless background drawn in Paint.net and vectorised with Vector Magic. The starting point was a photograph of drinking straws from Pixabay.

Source Firkin

Light Mesh #707
 Fabric  CC BY-SA 3.0

Love me some light mesh on a Monday. Sharp.

Source Wilmotte Bastien

Graphy #350
 Grid  CC BY-SA 3.0

Looks like a technical drawing board: small squares forming a nice grid.

Source We Are Pixel8

Dark Wall #1253
 Wall  CC 0

Zerro CC tillable texture of stones photographed and made by me. CC0

Source Sojan Janso

"Colorful Stripes", Diagonally Striped Background #903
 Stripes  CC BY-SA 3.0

This background pattern contains worn out colorful stripes as a texture.

Source V. Hartikainen

Dungeons & Flagons 2 #1418
 Diamond  CC 0

Gamedev - Floors Textures. CC0 License.

Source Davit Masia

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

Old [email protected] #632
 Wall  CC BY-SA 3.0

A bit of scratched up grayness. Always good.

Source Josh Green

Floral background 2 #380
 Wall  CC 0

Background formed from the original with an emboss effect

Source GDJ

Rough [email protected] #313
 Fabric  CC BY-SA 3.0

More tactile goodness. This time in the form of some rough cloth.

Source Bartosz Kaszubowski

Background pattern 204 #2476
 Red  CC 0

Drawn originally with Paint.net.

Source Firkin

Prismatic Dots Background [email protected] #512
 Dark  CC 0

Prismatic Dots Background 6

Source GDJ

[email protected] #720
 Fabric  CC BY-SA 3.0

Number 2 in a series of 5 beautiful patterns. Can be found in colors on the submitter’s website.

Source Janos Koos

Abstract Arbitrary Geometric [email protected] #498
 Noise  CC 0

Abstract Arbitrary Geometric Background derived from an image on Pixabay.

Source GDJ

Small [email protected] #116
 Stripes  CC BY-SA 3.0

Sharp pixel pattern looking like some sort of fabric.

Source Dmitry

Bedge Grunge #978
 Paper  CC BY-SA 3.0

A large (588x375px) sand-colored pattern for your ever-growing collection. Shrink at will.

Source Alex Tapein

Beechwood #1295
 Wood  CC 0

ZeroCC tileable beechwood wood texture, generated in Neo Texture Edit by me. CC0

Source Sojan Janso

Metal Pole Rusty & Green #1653
 Metal  CC 0

Metal-Rusty. CC0 License.

Source Unknow

Finery #1369
 Unknow  CC 0

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

Source Linolafett

Seamless Prismatic Pythagorean Line Art Pattern No Background #569
 Light  CC 0

Seamless Prismatic Pythagorean Line Art Pattern No Background. A seamless pattern that includes the original tile (go to Objects / Pattern / Pattern To Objects in Inkscape's menu to extract it).

Source GDJ

Brushed [email protected] #68
 Light  CC BY-SA 3.0

A light brushed aluminum pattern for your pleasure.

Source Tim Ward

Floral background #1964
 Dark  CC 0

Remixed from a drawing in 'A Child of the Age', Francis Adams, 1894.

Source Firkin

Leafy pattern 12 #1764
 Dark  CC 0

From a drawing in 'At home', J. Sowerby, J. Crane and T. Frederick, 1881.

Source Firkin

Seamless Green Curtain Background #1333
 Green  CC BY-SA 3.0

A free seamless background image with abstract texture of green "curtain".

Source V. Hartikainen

Rice Wall #1255
 Wall  CC 0

Zerro CC tillable texture of stones photographed and made by me. CC0

Source Sojan Janso

"Wide Stripe Wallpaper", Seamless Pattern #1227
 Yellow  CC BY-SA 3.0

A seamless pattern with wide vertical stripes colored in pale yellow.

Source V. Hartikainen