Ice Age #637
 Paper  CC BY-SA 3.0

I asked Gjermund if he could make a pattern for us – result!

Source Gjermund Gustavsen

 More Textures
Lyonnette #761
 Gray  CC BY-SA 3.0

Small crosses with round edges. Quite cute.

Source Tish

Dark Wall #817
 Dark  CC BY-SA 3.0

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

Source Atle Mo

Prismatic Chevrons Pattern 5 With [email protected] #470
 Dark  CC 0

Prismatic Chevrons Pattern 5 With Background

Source GDJ

Graphene pattern 2 #2234
 Dark  CC 0

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

Source Firkin

Square frame 3 #2354
 Dark  CC 0

Formed in Paint.net and vectorised in Vector Magic.

Source Firkin

Wavy background #2014
 Blue  CC 0

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

Source Firkin

paper filer pack 2 #140
 Noise  CC 0

A set of paper filters. The base texture is generated the same way, only the compositing mode is varied.

Source Lazur URH

Background pattern 243 (colour 2) #2196
 Colorful  CC 0

Random colour tile.

Source Firkin

Background pattern black #2026
 Dark  CC 0

Remixed from a design seen in 'Burghley. The Life of William Cecil', William Charlton, 1857. The tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i.

Source Firkin

Otis [email protected] #1005
 Dark  CC BY-SA 3.0

Otis Ray Redding was an American soul singer-songwriter, record producer, arranger, and talent scout. So you know.

Source Thomas Myrman

Background pattern 309 #1866
 Yellow  CC 0

Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.

Source Firkin

Background pattern 8 (black) #209
 Dark  CC 0

Black version of a pattern that came out of playing with the 'light rays' plug-in for Paint.net

Source Firkin

Smooth [email protected] #28
 Light  CC BY-SA 3.0

Some rectangles, a bit of dust and grunge, plus a hint of concrete.

Source Atle Mo

Background pattern 105 #563
 Dark  CC 0

A seamless pattern formed from background pattern 102

Source Firkin

Floral background 20 #1813
 Red  CC 0

Derived from a drawing in 'Elfrica. An historical romance of the twelfth century', Charlotte Boger, 1885

Source Firkin

45-Degree Fabric #1
 Fabric  CC BY-SA 3.0

Medium gray fabric pattern with 45-degree lines going across.

Source Atle Mo

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

Prismatic Dots Background 5

Source GDJ

Prismatic Polka Dots Mark II 2 No Background #532
 Noise  CC 0

Prismatic Polka Dots Mark II 2 No Background

Source GDJ

Bright [email protected] #88
 Light  CC BY-SA 3.0

It’s okay to be square! A nice light gray pattern with random squares.

Source Waseem Dahman

Dungeons & Flagons 2 #1418
 Diamond  CC 0

Gamedev - Floors Textures. CC0 License.

Source Davit Masia

Stripey ball pattern #1997
 Yellow  CC 0

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

Source Firkin

Concrete Seamless #1341
 Stone  CC BY-SA 3.0

Concrete: back and better than ever.

Source Anchour

Old Mathematics #43
 Stripes  CC BY-SA 3.0

This one takes you back to math class. Classic mathematic board underlay.

Source Josh Green

Wall #1360
 Wall  CC 0

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

Source Linolafett

Chequered dotted cat #2430
 Grid  CC 0

A chequered cat with polka dots and background.

Source Firkin

Brushed Aluminum 7 #1395
 Dark  CC 0

Gamedev - Metal Textures. CC0 License.

Source Davit Masia

Prismatic Groovy Concentric Background No Black #451
 Noise  CC 0

Prismatic Groovy Concentric Background No Black

Source GDJ

Pixel Weave #1154
 Unknow  CC BY-SA 3.0

Clean and crisp lines all over the place. Wrap it up with this one.

Source Dax Kieran