Escheresque #777
Light CC BY-SA 3.0Cubes as far as your eyes can see. You know, because they tile.
Source Jan Meeus
More Textures
Prismatic Geometric Tessellation Pattern 2 No Background #553
Noise CC 0Prismatic Geometric Tessellation Pattern 2 No Background
Source GDJ
Aged Paper Background Tile #1074
Paper CC BY-SA 3.0A seamless background tile of aged paper with shabby look.
Source V. Hartikainen
Background pattern 234 (colour 3) #2257
Blue CC 0Drawn in Paint.net and vectorised in Vector Magic.
Source Firkin
Seamless Cork Board Background #881
Wood CC BY-SA 3.0Here's a seamless brown cork board background texture. Feel free to download or reshare if you like.
Source V. Hartikainen
Decorative divider 187 #2522
Dark CC 0From a drawing in 'Studies for Stories', Jean Ingelow, 1864.
Source Firkin
Lined Paper #1034
Light CC BY-SA 3.0I know there is one here already, but this is sexy!
Source Gjermund Gustavsen
Background pattern yellow #1999
Yellow CC 0Seamless pattern formed from a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
Ravenna #354
Wall CC BY-SA 3.0I guess this is inspired by the city of Ravenna in Italy and its stone walls.
Source Sentel
Food and drink design #1897
Dark CC 0Colour version that is close to the original drawing uploaded to Pixabay by pencilparker.
Source Firkin
Background pattern 309 (colour 4) #1863
Green CC 0Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
White Leather #639
Fabric CC BY-SA 3.0I took the liberty of using Dmitry’s pattern and made a version without perforation.
Source Atle Mo
Seed #1289
Wall CC 0Zero CC tileable seed texture, edited by me to be seamless from a Pixabay image. CC0
Source Sojan Janso
Square ornament 27 #2523
Dark CC 0Formed from decorative divider 184 in paint.net. Vectorised with Vector Magic.
Source Firkin
Tessellation 10 (variant 2) #2544
Grid CC 0An alternative colour scheme to the original seamless pattern.
Source Firkin
tortoise in tortoiseshell #2537
Grid CC 0The image depicts a seamless pattern of a tortoise in tortoiseshell (hexagon).
Source Yamachem
Large Leather #649
Paper CC BY-SA 3.0More leather, and this time it’s bigger! You know, in case you need that.
Source Elemis
Dark Wall #817
Dark CC BY-SA 3.0Just to prove my point, here is a slightly modified dark version.
Source Atle Mo
Robots #125
Dark CC BY-SA 3.0And some more testing, this time with Seamless Studio. It’s Robots FFS!
Source Seamless Studio
Dark Leather@2X #130
Dark CC BY-SA 3.0You were craving more leather, so I whipped this up by scanning a leather jacket.
Source Atle Mo
Light Aluminum #304
Wall CC BY-SA 3.0Used correctly, this could be nice. Used in a bad way, all hell will break loose.
Source Atle Mo
Decorative divider 277 #1906
Colorful CC 0Vector version of a png that was uploaded to Pixabay by pencilparker
Source Firkin
Spiral pattern 3 #1934
Dark CC 0From a drawing in 'Danmarks Riges Historie af J. Steenstrup, Kr. Erslev, A. Heise, V. Mollerup, J. A. Fridericia, E. Holm, A. D. Jørgensen', 1897.
Source Firkin
Bird pattern (colour 2) #2292
Green CC 0Utilising a bird from s-light and some flowers from Almeidah. To get the unit tile, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin