Cube & Dark #1626
 Dark  CC 0

Manmade & Civilisation-Tech-Lights. CC0 License.

Source Unknow

 More Textures
Subtle White Feathers #1103
 Light  CC BY-SA 3.0

This one is amazing, truly original. Go use it!

Source Viahorizon

Decorative divider 198 #2437
 Dark  CC 0

From a drawing in 'Codogno e il suo territorio nella cronaca e nella storia'', Gio and Giarella Cairo, 1897.

Source Firkin

Background pattern 252 (colour 3) #2160
 Green  CC 0

Recreated from a pattern found in 'Az Osztrák-Magyar Monarchia irásban és képben', 1882. To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.

Source Firkin

cloth texture 02 #2449
 Fabric  CC 0

This is a dark-red seamless cloth texture.

Source Yamachem

Pool Table #175
 Wall  CC BY-SA 3.0

This makes me wanna shoot some pool! Sweet green pool table pattern.

Source Caveman

Prismatic Geometric Pattern Background 2 #409
 Noise  CC 0

Prismatic Geometric Pattern Background 2

Source GDJ

Floral background 22 #1780
 Dark  CC 0

From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.

Source Firkin

Cube & Dark #1627
 Dark  CC 0

Manmade & Civilisation-Tech-Lights. CC0 License.

Source Unknow

Gears pattern 4 (colour 3) #2236
 Blue  CC 0

A seamless pattern formed from gears.

Source Firkin

Lockingstripes #1685
 Paper  CC 0

Paper-Wallpaper. CC0 License.

Source Unknow

Floors & Block #1600
 Wall  CC 0

Floors-Tiles. CC0 License.

Source Unknow

Light Note Paper #942
 Stripes  CC BY-SA 3.0

Here's an yet another seamless note paper texture for use as a background on websites.

Source V. Hartikainen

Green [email protected] #86
 Dark  CC BY-SA 3.0

Luxurious looking pattern (for a T-shirt maybe?) with a hint of green.

Source Simon Meek

Congruent Pentagon Outline #1308
 Dark  CC BY-SA 3.0

By popular request, an outline version of the pentagon pattern.

Source Atle Mo

Wood 8 #1452
 Wood  CC 0

Gamedev - Wood Textures. CC0 License.

Source Davit Masia

Background pattern 225 (colour 2) #2326
 Yellow  CC 0

Seamless pattern formed from a tile that can be extracted by selecting the rectangle in Inkscape and using shift-alt-i.

Source Firkin

[email protected] #1151
 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

Prismatic Dots Background [email protected] #510
 Noise  CC 0

Prismatic Dots Background 5

Source GDJ

[email protected] #315
 Paper  CC BY-SA 3.0

Floral patterns will never go out of style, so enjoy this one.

Source Lasma

Fake Luxury #621
 Diamond  CC BY-SA 3.0

Fake or not, it’s quite luxurious.

Source Factorio.us Collective

"Black Metal Grid", Seamless Background Pattern #1080
 Metal  CC BY-SA 3.0

A free seamless background pattern for use on websites.

Source V. Hartikainen

Berries #1672
 Paper  CC 0

Paper-Wallpaper. CC0 License.

Source Unknow

Colorful Bicycles Background #207
 Noise  CC 0

Pixabay.

Source GDJ

Diamond pattern 2 #2268
 Red  CC 0

From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.

Source Firkin

Leafy frame 32 #1714
 Dark  CC 0

Derived from an image that was uploaded to Pixabay by Darkmoon1968

Source Firkin

Prismatic Curved Diamond Pattern 4 No [email protected] #542
 Diamond  CC 0

Prismatic Curved Diamond Pattern 4 No Background

Source GDJ

Background pattern #1942
 Brown  CC 0

Formed by distorting an image on Pixabay that was uploaded by gustavorezende. To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.

Source Firkin

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