Background pattern 9 (greyscale) #213
 Dark  CC BY-SA 3.0

Greyscale version of a pattern that came out of playing with the 'light rays' plug-in for Paint.net

Source Firkin

 More Textures
Prismatic Polyskelion Pattern No Background #394
 Light  CC 0

Prismatic Polyskelion Pattern No Background

Source GDJ

Diagonal [email protected] #1007
 Gray  CC BY-SA 3.0

It has waves, so make sure you don’t get sea sickness.

Source CoolPatterns

Stone Wall & Dark #1558
 Stone  CC 0

Incoming catena. Stone & well. CC0 texture.

Source Unknow

Embossed Paper #731
 Paper  CC BY-SA 3.0

One more from Badhon, sharp horizontal lines making an embossed paper feeling.

Source Badhon Ebrahim

Dark Embroidery #1340
 Dark  CC BY-SA 3.0

A classic dark tile for a bit of vintage darkness.

Source Listvetra

Floors & Yellow #1606
 Wall  CC 0

Floors-Tiles. CC0 License.

Source Unknow

Paper Blank 1 #2115
 Paper  CC 0

CC0 textures, backgrounds.

Source SliverKnight

Crossword #1301
 Light  CC BY-SA 3.0

Borderline too subtle. Yes, I said it.

Source Ideawebme

Weave #733
 Wall  CC BY-SA 3.0

Medium gray pattern with small strokes to give a weave effect.

Source Catherine

Pewter #1638
 Metal  CC 0

Metal-Plain or Painted. CC0 License.

Source Unknow

Floors & Black #1607
 Wall  CC 0

Floors-Tiles. CC0 License.

Source Unknow

Retro Circles Background 5 No Black #426
 Noise  CC 0

Retro Circles Background 5 No Black

Source GDJ

Waves #1694
 Paper  CC 0

Paper-Wallpaper. CC0 License.

Source Unknow

Floral background 18 (negative) #1832
 Dark  CC 0

Negative version of the original

Source Firkin

Decorative divider 223 #2207
 Dark  CC 0

Inspired by a design found in 'Konstantinápolyi emlékeim', Miklos Chriszto, 1893.

Source Firkin

Prismatic Triangular Background Design Mark II 5 #406
 Dark  CC 0

Prismatic Triangular Background Design Mark II 5

Source GDJ

White [email protected] #1184
 Wall  CC BY-SA 3.0

Brushed aluminum, in a bright gray version. Lovely 2X as well.

Source Andre Schouten

Background Patterns Lazuli #253
 Fabric  CC 0

If you want png files of this u can download them here : viscious-speed.deviantart.com/gallery/27635117

Source Viscious-Speed

Pattern & Plywood #1348
 Wood  CC 0

CC0 for Free, hope you like it.

Source Yethiel

Escheresque #777
 Light  CC BY-SA 3.0

Cubes as far as your eyes can see. You know, because they tile.

Source Jan Meeus

Stone Wall & Red #1505
 Red  CC 0

Incoming catena. Stone & well. CC0 texture.

Source Unknow

samekomon-02 #2263
 Pink  CC 0

The image is a remix of "edo pattern-samekomon".I changed the color of dots from black to white and added BG in light-brown.

Source Yamachem

Broken [email protected] #365
 Dark  CC BY-SA 3.0

Beautiful dark noise pattern with some dust and grunge.

Source Vincent Klaiber

Carbon Fiber [email protected] #327
 Carbon  CC BY-SA 3.0

Bigger is better, right? So here you have some large carbon fiber.

Source Factorio.us Collective

Prismatic Geometric Tessellation Pattern 3 No Background #555
 Noise  CC 0

Prismatic Geometric Tessellation Pattern 3 No Background

Source GDJ

Background pattern pink #1948
 Pink  CC 0

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

Source Firkin

Stone Granite #1292
 Stone  CC 0

ZeroCC tileabel stone granite texture, edited from pixabay. CC0

Source Sojan Janso

Floral background 16 #1914
 Dark  CC 0

Floral background 16

Source Firkin