Stone Wall & Gray #1512
 Stone  CC 0

Incoming catena. Stone & well. CC0 texture.

Source Unknow

 More Textures
Ravenna #354
 Wall  CC BY-SA 3.0

I guess this is inspired by the city of Ravenna in Italy and its stone walls.

Source Sentel

Wood 3b #1446
 Wood  CC 0

Gamedev - Wood Textures. CC0 License.

Source Davit Masia

HIXS Evolution #609
 Dark  CC BY-SA 3.0

Heavy depth and shadows here, but might work well on some mobile apps.

Source Damian Rivas

Vintage Clay Tile 6 #1463
 Unknow  CC 0

Gamedev - Roofs Textures. CC0 License.

Source Davit Masia

Gray Dark #1238
 Gray  CC BY-SA 3.0

Free cc0, hope you will like!

Source SliverKnight

Floral background #2474
 Green  CC 0

Derived from an image on publicdomainpictures.net.

Source Firkin

Stone Wall & Green #1536
 Stone  CC 0

Incoming catena. Stone & well. CC0 texture.

Source Unknow

White Leather #639
 Fabric  CC BY-SA 3.0

I took the liberty of using Dmitry’s pattern and made a version without perforation.

Source Atle Mo

More Rough Wood 6 #1432
 Wood  CC 0

Gamedev - Wood Textures. CC0 License.

Source Davit Masia

Prismatic Geometric Pattern [email protected] #787
 Noise  CC 0

Prismatic Geometric Pattern Background

Source GDJ

Cube & Dark #1626
 Dark  CC 0

Manmade & Civilisation-Tech-Lights. CC0 License.

Source Unknow

Red & Black Well #1260
 Wall  CC 0

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

Source Sojan Janso

Decorative divider 240 #2086
 Dark  CC 0

From a drawing in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.

Source Firkin

Background pattern 260 #2094
 Orange  CC 0

Tile available in Inkscape using shift-alt-i on the selected rectangle

Source Firkin

Tweed #1150
 Dark  CC BY-SA 3.0

Tweed is back in style – you heard it here first. Also, the @2X version here is great!

Source Simon Leo

Fruit on a branch #1968
 Dark  CC 0

From a drawing in 'Line and form', Walter Crane, 1914.

Source Firkin

Pyramid #895
 Light  CC BY-SA 3.0

Could remind you a bit of those squares in Super Mario Bros, yeh?

Source Jeff Wall

Diagonal [email protected] #182
 Fabric  CC BY-SA 3.0

A simple but elegant classic. Every collection needs one of these.

Source Christopher Burton

Background pattern 21 #205
 Light  CC 0

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

Source Firkin

Decorative divider 224 #2206
 Dark  CC 0

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

Source Firkin

Decorative divider 223 #2207
 Dark  CC 0

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

Source Firkin

Background pattern 224 (colour 2) #2341
 Colorful  CC 0

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

Source Firkin

Shapes pattern 2 (colour 3) #2239
 Blue  CC 0

A background made up of shapes.

Source Firkin

Noisy Net #976
 Dark  CC BY-SA 3.0

Little x’es, noise and all the stuff you like. Dark like a Monday, with a hint of blue.

Source Tom McArdle

Stone Wall & Black #1522
 Stone  CC 0

Incoming catena. Stone & well. CC0 texture.

Source Unknow

Light Grey Floral Motif #344
 Wall  CC BY-SA 3.0

Lovely light gray floral motif with some subtle shades.

Source GraphicsWall

Floral design 107 #1713
 Dark  CC 0

Derived from an image that was uploaded to Pixabay by Darkmoon1968

Source Firkin

Mix & Blue Pattern #1628
 Metal  CC 0

Metal-Plain or Painted. CC0 License.

Source Unknow