Background pattern black and white #2030
 Dark  CC 0

A background pattern inspired by designs seen in 'Burghley. The Life of William Cecil', William Charlton, 1857.

Source Firkin

 More Textures
Polaroid #187
 Wall  CC BY-SA 3.0

Smooth Polaroid pattern with a light blue tint.

Source Daniel Beaton

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

Page ornament #1987
 Dark  CC 0

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

Source Firkin

Geometric pattern #2005
 Grid  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

[email protected] #126
 Dark  CC BY-SA 3.0

And some more testing, this time with Seamless Studio. It’s Robots FFS!

Source Seamless Studio

More Rough Wood 2 #1428
 Wood  CC 0

Gamedev - Wood Textures. CC0 License.

Source Davit Masia

Halftone #1310
 Light  CC BY-SA 3.0

Halftone, not halfling. Got it?

Source Atle Mo

Prismatic Curved Diamond Pattern 2 No [email protected] #539
 Diamond  CC 0

Prismatic Curved Diamond Pattern 2 No Background

Source GDJ

Colorful Paw Prints Pattern Background #260
 Noise  CC 0

pixabay.

Source GDJ

Abstract Tiled Background Extended 12 #523
 Noise  CC 0

Abstract Tiled Background Extended 12

Source GDJ

Cube & Dark #1627
 Dark  CC 0

Manmade & Civilisation-Tech-Lights. CC0 License.

Source Unknow

Stone Wall & Yellow #1553
 Stone  CC 0

Incoming catena. Stone & well. CC0 texture.

Source Unknow

Background pattern 328 (colour 4) #1798
 Green  CC 0

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

Source Firkin

Wood Pattern #370
 Wood  CC BY-SA 3.0

One of the few full-color patterns here, but this one was just too good to pass up.

Source Alexey Usoltsev

Planks & Roughcedar #1351
 Wood  CC 0

CC0 for Free, hope you like it.

Source Yethiel

Subtle Stripes #751
 Stripes  CC BY-SA 3.0

Vertical lines with a bumpy, yet crisp, feel to it.

Source Raasa

Decorative divider 230 #2150
 Dark  CC 0

From a design found in 'History of the Virginia Company of London; with letters to and from the first Colony, never before printed', Edward Neill, 1869.

Source Firkin

Metal & Red #1655
 Metal  CC 0

Metal-Rusty. CC0 License.

Source Unknow

Black Wall #1240
 Wall  CC 0

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

Source Sojan Janso

Gradient [email protected] #694
 Grid  CC BY-SA 3.0

It’s big, it’s gradient—and it’s square.

Source Brankic1979

Floral pattern 6 (colour 3) #2459
 Fabric  CC 0

Alternative colour scheme for the original floral pattern.

Source Firkin

Stone Wall & Dark #1494
 Stone  CC 0

Incoming catena. Stone & well. CC0 texture.

Source Unknow

Background pattern 1 #220
 Noise  CC 0

A pattern derived from repeating unit cells each derived from part of a fractal rendering in paint.net.

Source Firkin

Boiler Plate Rust #1644
 Metal  CC 0

Metal-Processed. CC0 License.

Source Unknow

Triangular Psychosis 4 #236
 Noise  CC 0

A colorful triangular background, variation 4.

Source GDJ

Grunge For Surfaces 2 #1399
 Dark  CC 0

Gamedev - Metal Textures. CC0 License.

Source Davit Masia

Wood Chips 4 #2102
 Unknow  CC 0

CC0 textures, backgrounds.

Source SliverKnight