Natural Paper #833
 Paper  CC BY-SA 3.0

You know I’m a sucker for these. Well-crafted paper pattern.

Source Mihaela Hinayon

 More Textures
Soft Pad #613
 Fabric  CC BY-SA 3.0

Bumps, highlight and shadows – all good things.

Source Badhon Ebrahim

Prismatic Dots Background 7 #513
 Dark  CC 0

Prismatic Dots Background 7

Source GDJ

Concrete 2 Col #1466
 Gray  CC 0

Ground style CC0 texture.

Source StruffelProductions

Asfault 5 #1384
 Dark  CC 0

Gamedev - Asphalt textures. CC0 License.

Source Davit Masia

Wavy tile #2024
 Colorful  CC 0

Seamless tile drawn in Paint.net and vectorised in Vector Magic.

Source Firkin

Square ornament 31 #2434
 Dark  CC 0

Drawn in Paint.net using the kaleidoscope plug-in and vectorised.

Source Firkin

Prismatic Polka Dots 3 No Background #528
 Noise  CC 0

Prismatic Polka Dots 3 No Background

Source GDJ

Red & Black Well #1260
 Wall  CC 0

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

Source Sojan Janso

Noise Pattern With Subtle Cross Lines #179
 Grid  CC BY-SA 3.0

More bright luxury. This is a bit larger than fancy deboss, and with a bit more noise.

Source Viszt Péter

Stone Wall & Purple #1540
 Stone  CC 0

Incoming catena. Stone & well. CC0 texture.

Source Unknow

Classy [email protected] #612
 Dark  CC BY-SA 3.0

This is lovely, just the right amount of subtle noise, lines and textures.

Source Richard Tabor

Background pattern 19 (black) #203
 Dark  CC 0

A seamless pattern the starting point for which was a 'rainbow twist' texture in Paint.net.

Source Firkin

[email protected] #118
 Grid  CC BY-SA 3.0

Dark squares with some virus-looking dots in the grid.

Source Hugo Loning

Binding [email protected] #1137
 Light  CC BY-SA 3.0

Light gray version of the Binding pattern that looks a bit like fabric.

Source Newbury

One in a Million #1346
 Gray  CC BY-SA 3.0

Nicely executed tiling for an interesting pattern.

Source Ignasi Àvila Padró

Tactile Paving A1 #2121
 Wall  CC 0

CC0 textures, backgrounds.

Source SliverKnight

Soft Kill #318
 Dark  CC BY-SA 3.0

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

Source Factorio.us Collective

cloth texture 02 #2449
 Fabric  CC 0

This is a dark-red seamless cloth texture.

Source Yamachem

Wallpaper Tile 13 #240
 Light  CC 0

An abstract Background pattern of purple twisty patterns.

Source TikiGiki

Floral design 101 (version 2) #1757
 Green  CC 0

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

Source Firkin

Wood 1 #1443
 Wood  CC 0

Gamedev - Wood Textures. CC0 License.

Source Davit Masia

Background pattern 312 #1860
 Blue  CC 0

Alternative colour scheme

Source Firkin

Gravel #1367
 Unknow  CC 0

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

Source Linolafett

Patchwork Quilt Pattern Background #228
 Noise  CC 0

PDP

Source GDJ

Decorative divider 224 #2206
 Dark  CC 0

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

Source Firkin

Satin Weave #1044
 Light  CC BY-SA 3.0

Super simple but very nice indeed. Gray with vertical stripes.

Source Merrin Macleod

Background pattern 315 (colour 3) #1843
 Green  CC 0

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

Source Firkin

Prismatic Dots Background [email protected] #514
 Dark  CC 0

Prismatic Dots Background 7

Source GDJ