Background pattern 215 (colour 3) #2369
 Pink  CC 0

A grid of squares with green colours. Since the colours are randomly distributed it is automatically seamless.

Source Firkin

 More Textures
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

Decorative divider 281 #1874
 Wall  CC 0

Remixed from a drawing that was uploaded to Pixabay by ractapopulous

Source Firkin

Background pattern 215 (colour 2) #2370
 Blue  CC 0

A grid of squares with green colours. Since the colours are randomly distributed it is automatically seamless.

Source Firkin

Grunge For Surfaces 3 #1400
 Dark  CC 0

Gamedev - Metal Textures. CC0 License.

Source Davit Masia

Christmas pattern (colour) #2423
 Fabric  CC 0

Derived from an image on Pixabay.

Source Firkin

Seamless Colorful Floral Pattern Background #256
 Fabric  CC 0

PDP

Source GDJ

Leaded glass background (colour 5) #2050
 Colorful  CC 0

Seamless pattern the tile.

Source Firkin

Seamless Canvas (Pale Brown) #1165
 Fabric  CC BY-SA 3.0

A seamless canvas texture for using as background on websites. Colored in pale tones of brown.

Source V. Hartikainen

Floral pattern 15 #1753
 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

Prismatic Geometric Pattern [email protected] #787
 Noise  CC 0

Prismatic Geometric Pattern Background

Source GDJ

Background pattern 308 (colour 2) #1871
 Green  CC 0

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

Source Firkin

Polyester Lite #837
 Light  CC BY-SA 3.0

A tiny polyester pixel pattern.

Source Jeremy

Texturetastic Gray #615
 Paper  CC BY-SA 3.0

This ladies and gentlemen, is texturetastic! Love it.

Source Adam Pickering

Dark Stripes #39
 Dark  CC BY-SA 3.0

Very dark pattern with some noise and 45-degree lines.

Source Stefan Aleksić

mesh 01 #2276
 Light  CC 0

The image depicts a mesh .I made it as template.

Source Yamachem

Prismatic Curved Diamond Pattern 4 No [email protected] #542
 Diamond  CC 0

Prismatic Curved Diamond Pattern 4 No Background

Source GDJ

Fabric of Squares #1095
 Light  CC BY-SA 3.0

As far as fabric patterns goes, this is quite crisp.

Source Heliodor Jalba

Wild [email protected] #989
 Dark  CC BY-SA 3.0

Wild Oliva or Oliva Wilde? Darker than the others, sort of a medium dark pattern.

Source Badhon Ebrahim

Nice Snow #1199
 Light  CC BY-SA 3.0

Not the most subtle, but very useful.

Source Kerstkaarten

Floral design 101 (version 2) #1757
 Green  CC 0

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

Source Firkin

Pattern & Iron Net #1618
 Wall  CC 0

Fence. CC0 License.

Source Unknow

Fence 9 #2195
 Wood  CC 0

Seamless texture made from a raster image on Pixabay.

Source Firkin

Dark Brick Pattern #1032
 Stone  CC BY-SA 3.0

A seamless pattern of dark bricks. Maybe it's not very realistic, but it looks good in my opinion.

Source V. Hartikainen

Floral background 19 (negative) #1831
 Dark  CC 0

Negative version of the original

Source Firkin

Door Rail & Black #1625
 Dark  CC 0

Manmade & Civilisation-Details. CC0 License.

Source Unknow

Diamonds Are [email protected] #184
 Diamond  CC BY-SA 3.0

Sharp diamond pattern. A small 24x18px tile.

Source Tom Neal

Dark Metallic Background Pattern #1088
 Metal  CC BY-SA 3.0

A dark background pattern/texture of a dimpled metal plate.

Source V. Hartikainen