Wavy background #2018
 Colorful  CC 0

CC0 and a seamless pattern from a tile drawn in Paint.net .

Source SliverKnight

 More Textures
Background pattern 312 (colour 2) #1859
 Red  CC 0

Alternative colour scheme

Source Firkin

Wavy background #2015
 Green  CC 0

A seamless pattern from a tile drawn in Paint.net and vectorised in Vector Magic

Source Firkin

Textured Paper #1130
 Paper  CC BY-SA 3.0

You know I love paper patterns. Here is one from Stephen. Say thank you!

Source Stephen Gilbert

Decorative divider 220 #2230
 Dark  CC 0

Prepared mostly as a raster in Paint.net and vectorised.

Source Firkin

Stone Wall & Light #1550
 Stone  CC 0

Incoming catena. Stone & well. CC0 texture.

Source Unknow

Stone Wall & Yellow #1530
 Stone  CC 0

Incoming catena. Stone & well. CC0 texture.

Source Unknow

Strange [email protected] #866
 Light  CC BY-SA 3.0

This is indeed a bit strange, but here’s to the crazy ones!

Source Christopher Buecheler

Church #633
 Paper  CC BY-SA 3.0

I have no idea what J Boo means by this name, but hey – it’s hot.

Source j Boo

Prismatic Geometric Tessellation Pattern No Background #551
 Noise  CC 0

Prismatic Geometric Tessellation Pattern No Background

Source GDJ

Prismatic Diamond Background 6 #383
 Diamond  CC 0

Prismatic Diamond Background 6

Source GDJ

Tessellation 16 #2215
 Yellow  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

Texturetastic Gray #615
 Paper  CC BY-SA 3.0

This ladies and gentlemen, is texturetastic! Love it.

Source Adam Pickering

Background pattern 234 (colour 3) #2257
 Blue  CC 0

Drawn in Paint.net and vectorised in Vector Magic.

Source Firkin

Prismatic Polka Dots Mark II No [email protected] #531
 Noise  CC 0

Prismatic Polka Dots Mark II No Background

Source GDJ

Stone Wall & Yellow #1578
 Stone  CC 0

Incoming catena. Stone & well. CC0 texture.

Source Unknow

Prismatic Abstract Geometric Background #269
 Noise  CC 0

Prismatic Abstract Geometric Background derived from an image on Pixabay.

Source GDJ

Brushed Aluminum #1388
 Metal  CC 0

Gamedev - Metal Textures. CC0 License.

Source Davit Masia

Background pattern 246 (colour 4) #2183
 Green  CC 0

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

Source Firkin

Bamboo Background Pattern #1330
 Green  CC BY-SA 3.0

This background pattern looks like bamboo to me. Feel free to download it for your website (for your blog perhaps?).

Source V. Hartikainen

Background pattern pink and colours #2032
 Colorful  CC 0

A background pattern inspired by designs seen in 'Burghley. The Life of William Cecil', William Charlton, 1857.

Source Firkin

BO Play #661
 Dark  CC BY-SA 3.0

Inspired by the B&O Play, I had to make this pattern.

Source Atle Mo

Carbon Fiber v2 #105
 Carbon  CC BY-SA 3.0

One more updated pattern. Not really carbon fiber, but it’s the most popular pattern, so I’ll give you an extra choice.

Source Atle Mo

Black Metallic Pattern #1090
 Metal  CC BY-SA 3.0

A free black metallic background pattern. Here's a new pattern I made that looks metallic.

Source V. Hartikainen

Bedge Grunge #978
 Paper  CC BY-SA 3.0

A large (588x375px) sand-colored pattern for your ever-growing collection. Shrink at will.

Source Alex Tapein

Background pattern 214 (colour 4) #2373
 Yellow  CC 0

A seamless chequerboard pattern formed from a tile that can be had in Inkscape by selecting the rectangle and using shift+alt+i. Alternative colour scheme.

Source Firkin

Repeating Web Background (Dark Brown) #1079
 Metal  CC BY-SA 3.0

This one has rusty dark brown texture.

Source V. Hartikainen