Cork Panel Background Texture #869
 Wood  CC BY-SA 3.0

This one looks like a cork panel. Feel free to use it as a tiled background on your blog or website.

Source V. Hartikainen

 More Textures
Background pattern 6 #226
 Noise  CC 0

A pattern derived from part of a fractal rendering in Paint.net.

Source Firkin

[email protected] #297
 Grid  CC BY-SA 3.0

A subtle shadowed checkered pattern. Increase the lightness for even more subtle sexiness.

Source Josh Green

Plain & Wood #1355
 Wood  CC 0

CC0 for Free, hope you like it.

Source Yethiel

Floral pattern 7 (colour 3) #2289
 Pink  CC 0

Utilising some flowers from Almeidah. To get the unit tile, select the rectangle in Inkscape and use shift-alt-i.

Source Firkin

Decorative divider 272 (colour) #1926
 Yellow  CC 0

Remixed from a drawing in 'Hungary. A guide book. By several authors', 1890.

Source Firkin

Flowery pattern 3 (BW) #2331
 Dark  CC 0

Adapted from a jpg on Pixabay.

Source Firkin

Floral pattern 17 #1723
 Dark  CC 0

Derived from an image that was uploaded to Pixabay by mdmelo.

Source Firkin

[email protected] #349
 Light  CC BY-SA 3.0

White circles connecting on a light gray background.

Source Mark Collins

Paper Blank 3 #2117
 Paper  CC 0

CC0 textures, backgrounds.

Source SliverKnight

Prismatic Abstract Geometric Background 5 No [email protected] #792
 Noise  CC 0

Prismatic Abstract Geometric Background 5 No Black

Source GDJ

Floral pattern 6 (colour 6) #2455
 Fabric  CC 0

Alternative colour scheme for the original floral pattern.

Source Firkin

Translucent [email protected] #944
 Light  CC BY-SA 3.0

The file was named striped lens, but hey – Translucent Fibres works too.

Source Angelica

Background pattern green #1947
 Green  CC 0

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

Source Firkin

Double Lined #51
 Stripes  CC BY-SA 3.0

Horizontal and vertical lines on a light gray background.

Source Adam Anlauf

Pine Bark #1276
 Wall  CC 0

Zero CC tileable pine bark texture, photographed and made by me. CC0

Source Sojan Janso

Decorative divider 281 #1874
 Wall  CC 0

Remixed from a drawing that was uploaded to Pixabay by ractapopulous

Source Firkin

Wood Web Background #870
 Wood  CC BY-SA 3.0

Here's a tile-able wood background image for use in web design.

Source V. Hartikainen

Decorative divider 242 #2083
 Dark  CC 0

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

Source Firkin

Background pattern 302 #1894
 Red  CC 0

The tile this fill pattern is based on can be had by using shift+alt+i on the rectangle.

Source Firkin

Prismatic Polka Dots Mark II 3 No [email protected] #535
 Noise  CC 0

Prismatic Polka Dots Mark II 3 No Background

Source GDJ

Star pattern 2 #1898
 Dark  CC 0

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

Source Firkin

Flower 193 #1794
 Green  CC 0

From a drawing in 'Prose and Verse ', William Linton, 1836.

Source Firkin

Prismatic Dots [email protected] #502
 Noise  CC 0

Prismatic Dots Background

Source GDJ

Dark Wall #817
 Dark  CC BY-SA 3.0

Just to prove my point, here is a slightly modified dark version.

Source Atle Mo

Wood 6b #1450
 Wood  CC 0

Gamedev - Wood Textures. CC0 License.

Source Davit Masia

Finery #1370
 Wall  CC 0

Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!

Source Linolafett

"Beige Stone", Tileable Texture #1025
 Stone  CC BY-SA 3.0

"Beige Stone", Tileable Texture.

Source V. Hartikainen