White Wall 2 #1020
 Wall  CC BY-SA 3.0

A new one called white wall, not by me this time.

Source Yuji Honzawa

 More Textures
Green Striped Background #899
 Stripes  CC BY-SA 3.0

If you need a green background for your blog/website, try this one. Remember that Green Striped Background is seamlessly tileable.

Source V. Hartikainen

Wood 9 #1454
 Wood  CC 0

Gamedev - Wood Textures. CC0 License.

Source Davit Masia

Background pattern 245 #2192
 Green  CC 0

This was formed by distorting an image of a background on Pixabay.

Source Firkin

Pinetree in tortoiseshell(亀甲松) #2538
 Dark  CC 0

The image depicts a seamless pattern of Japanese Edo pattern called "kikkou-matsu" or "亀甲松" meaning " tortoiseshell-pinetree".The real pinetree is like this: https://jp.pinterest.com/pin/500744052301065077/

Source Yamachem

Abstract Ellipses Background #275
 Dark  CC 0

Abstract Ellipses Background

Source GDJ

Stone Wall & Gray #1512
 Stone  CC 0

Incoming catena. Stone & well. CC0 texture.

Source Unknow

Background pattern 238 #2229
 Red  CC 0

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

Source Firkin

Colourful background #2009
 Colorful  CC 0

Made by distorting a simple pattern using the 'sin waves' plugin for Paint.net and vectorising in Vector Magic

Source Firkin

White Sand #19
 Light  CC BY-SA 3.0

Same as gray sand but lighter. A sandy pattern with small light dots, and some angled strokes.

Source Atle Mo

Shattered #951
 Gray  CC BY-SA 3.0

A large pattern with funky shapes and form. An original. Sort of origami-ish.

Source Luuk van Baars

Concretia 7 #1414
 Gray  CC 0

Gamedev - Concrete Textures. CC0 License.

Source Davit Masia

Tessellation 15 #2223
 Dark  CC 0

The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.

Source Firkin

Wood 11 #1456
 Wood  CC 0

Gamedev - Wood Textures. CC0 License.

Source Davit Masia

Lined [email protected] #1035
 Light  CC BY-SA 3.0

I know there is one here already, but this is sexy!

Source Gjermund Gustavsen

Light Brown Wallpaper With Vertical Stripes #905
 Stripes  CC BY-SA 3.0

This seamless light brown background texture resembles a wallpaper with vertical stripes. One way to use it is as a tiled background on web sites.

Source V. Hartikainen

Blue on White Background Pattern #993
 Stripes  CC BY-SA 3.0

A background pattern with blue on white vertical stripes.

Source V. Hartikainen

[email protected] #954
 Dark  CC BY-SA 3.0

Hexagonal dark 3D pattern. What more can you ask for?

Source Norbert Levajsics

Background pattern 3 #222
 Noise  CC 0

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

Source Firkin

Leafy pattern #2335
 Dark  CC 0

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

Source Firkin

Waves #1694
 Paper  CC 0

Paper-Wallpaper. CC0 License.

Source Unknow

Decorative divider 213 #2336
 Dark  CC 0

Inspired by a drawing in 'Kulturgeschichte', Freidrich Hellwald, 1896.

Source Firkin

Decorative divider 238 #2088
 Dark  CC 0

From a drawing in 'The Quiver of Love', Walter Crane, 1876

Source Firkin

Wood 10 #1455
 Wood  CC 0

Gamedev - Wood Textures. CC0 License.

Source Davit Masia

Prismatic Groovy Concentric Background [email protected] #466
 Dark  CC 0

Prismatic Groovy Concentric Background 5

Source GDJ

Stone Wall & Green #1534
 Stone  CC 0

Incoming catena. Stone & well. CC0 texture.

Source Unknow

Lined Paper #362
 Stripes  CC BY-SA 3.0

The classic notebook paper with horizontal stripes.

Source Are Sundnes

Decorative divider 232 #2148
 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

Leafy divider (colour) #1759
 Green  CC 0

From a drawing in 'At home', J. Sowerby, J. Crane and T. Frederick, 1881.

Source Firkin