Prismatic Groovy Concentric Background 2 #453
 Noise  CC 0

Prismatic Groovy Concentric Background 2

Source GDJ

 More Textures
Light Aluminum #304
 Wall  CC BY-SA 3.0

Used correctly, this could be nice. Used in a bad way, all hell will break loose.

Source Atle Mo

Background pattern 313 #1858
 Dark  CC 0

Background pattern originally a PNG drawn in Paint.net

Source Firkin

Abstract Arbitrary Geometric Background #497
 Noise  CC 0

Abstract Arbitrary Geometric Background derived from an image on Pixabay.

Source GDJ

Background pattern 223 (colour 4) #2350
 Pink  CC 0

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

Source Firkin

Sine wave background #1735
 Dark  CC 0

The tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i

Source Firkin

Watercolor #1477
 Colorful  CC 0

Background Wall, Art Abstract, Watercolor Vintage style CC0 texture.

Source Ractapopulous

Interlocking pattern 3 #2406
 Grid  CC 0

A seamless pattern formed from a square tile. The tile can be retrieved by selecting the rectangle in Inkscape and using shift-alt-I.

Source Firkin

Cheap Diagonal Fabric #1345
 Gray  CC BY-SA 3.0

Fabric is never out of style.

Source Ufuk Sarp Selçok

Prismatic Abstract Geometric Background 4 No [email protected] #443
 Dark  CC 0

Prismatic Abstract Geometric Background 4

Source GDJ

Light Gray Fabric Pattern With Faded Stripes #965
 Stripes  CC BY-SA 3.0

A light gray fabric pattern with faded vertical stripes.

Source V. Hartikainen

Prismatic Geometric Tessellation Pattern 3 No Background #555
 Noise  CC 0

Prismatic Geometric Tessellation Pattern 3 No Background

Source GDJ

Background pattern 314 (colour 3) #1837
 Green  CC 0

The square tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i

Source Firkin

Tactile Noise #5
 Dark  CC BY-SA 3.0

A heavy dark gray base, some subtle noise and a 45-degree grid makes this look like a pattern with a tactile feel to it.

Source Atle Mo

Little Pluses #73
 Light  CC BY-SA 3.0

Subtle grunge and many little pluses on top.

Source Atle Mo

Retro Circles Background [email protected] #425
 Noise  CC 0

Retro Circles Background 5

Source GDJ

Small [email protected] #116
 Stripes  CC BY-SA 3.0

Sharp pixel pattern looking like some sort of fabric.

Source Dmitry

Paper [email protected] #1061
 Paper  CC BY-SA 3.0

Just what the name says, paper fibers. Always good to have.

Source Heliodor jalba

Cover Cells Book #1277
 Red  CC 0

Zero CC tileable hard cover cells book texture, 4k, scanned and made by me. CC0

Source Sojan Janso

Prismatic Dots Background [email protected] #506
 Noise  CC 0

Prismatic Dots Background 3

Source GDJ

Diamond pattern 2 (colour 3) #2266
 Colorful  CC 0

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

Source Firkin

Snow #627
 Wall  CC BY-SA 3.0

Real snow that tiles, not easy. This is not perfect, but an attempt.

Source Atle Mo

Background pattern 227 (colour 2) #2313
 Blue  CC 0

A seamless background drawn in Paint.net and vectorised with Vector Magic. The starting point was a photograph of drinking straws from Pixabay.

Source Firkin

Iron Grip #587
 Dark  CC BY-SA 3.0

Sounds like something from World of Warcraft. Has to be good.

Source Tony Kinard

Circles pattern #1917
 Yellow  CC 0

Fix side and a seamless pattern formed from circles.

Source SliverKnight

White Well & Fissure #1701
 Wall  CC 0

Background Wall, Art Abstract, white Well & CC0 texture.

Source Ractapopulous

Flowery branch #1891
 Colorful  CC 0

Cut from a jpg on Pixabay and vectorized

Source Firkin

Cardboard #278
 Paper  CC BY-SA 3.0

A good starting point for a cardboard pattern. This would work well in a variety of colors.

Source Atle Mo

Ravenna #354
 Wall  CC BY-SA 3.0

I guess this is inspired by the city of Ravenna in Italy and its stone walls.

Source Sentel