Shapes pattern 2 (colour 2) #2240
 Green  CC 0

A background made up of shapes.

Source Firkin

 More Textures
Grid Paper Background (Blue Gray) #1162
 Grid  CC BY-SA 3.0

A free grid paper background pattern for using on web sites.

Source V. Hartikainen

Delis #1673
 Paper  CC 0

Paper-Wallpaper. CC0 License.

Source Unknow

Zig-zag pattern 4 #2415
 Grid  CC 0

A seamless pattern based on a rectangular tile that can be retrieved in Inkscape by selecting the rectangle and using shift-alt-i.

Source Firkin

Prismatic Groovy Concentric Background 3 No Black #459
 Noise  CC 0

Prismatic Groovy Concentric Background 3 No Black

Source GDJ

Txture #757
 Dark  CC BY-SA 3.0

Dark, lines, noise, tactile. You get the drift.

Source Anatoli Nicolae

Decorative divider 285 #1847
 Dark  CC 0

From a drawing in 'In an Enchanted Island', William Mallock, 1892.

Source Firkin

Tessellation 16 (colour 2) #2214
 Colorful  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

Floors & Dark #1595
 Wall  CC 0

Floors-Tiles. CC0 License.

Source Unknow

Subtle Stripes #751
 Stripes  CC BY-SA 3.0

Vertical lines with a bumpy, yet crisp, feel to it.

Source Raasa

Background pattern 252 #2162
 Dark  CC 0

Recreated from a pattern found in 'Az Osztrák-Magyar Monarchia irásban és képben', 1882. To get the tile this is based on select the rectangle in Inkscape and use shift+alt+i.

Source Firkin

Offsetsquares #1688
 Paper  CC 0

Paper-Wallpaper. CC0 License.

Source Unknow

Decorative divider 286 #1824
 Dark  CC 0

Remixed from a PNG that was uploaded to Pixabay by VictorianLady

Source Firkin

Glassy Orange Pattern #1315
 Orange  CC BY-SA 3.0

This pattern comes in orange, and it looks as if it is "made of glass".

Source V. Hartikainen

Stone Wall & Purple #1567
 Stone  CC 0

Incoming catena. Stone & well. CC0 texture.

Source Unknow

Prismatic Groovy Concentric Background [email protected] #462
 Noise  CC 0

Prismatic Groovy Concentric Background 4

Source GDJ

Skulls #1302
 Yellow  CC BY-SA 3.0

Not subtle at all, but man – the craftsmanship is ace!

Source Adam

Floral pattern 3 (colour) #2330
 Colorful  CC 0

Adapted from a jpg on Pixabay.

Source Firkin

Floral Pattern Background 3 #218
 Noise  CC 0

PDP

Source GDJ

Subtle [email protected] #926
 Light  CC BY-SA 3.0

Super subtle indeed, a medium gray pattern with tiny dots in a grid.

Source Designova

Background pattern green #1950
 Green  CC 0

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

Source Firkin

Floral design 97 #1778
 Yellow  CC 0

From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.

Source Firkin

Light Toast #759
 Paper  CC BY-SA 3.0

Has nothing to do with toast, but it’s nice and subtle.

Source Pippin Lee

Background pattern 250 (colour 2) #2170
 Blue  CC 0

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

Source Firkin

Wall #1249
 Wall  CC 0

Zerro CC tillable texture of stones photographed and made by me. CC0

Source Sojan Janso

Paisley Background #495
 Light  CC 0

Paisley Background

Source GDJ

Wine Cork #33
 Light  CC BY-SA 3.0

Wine cork texture based off a scanned corkboard.

Source Atle Mo

Light Gray Paper With Horizontal Lines #904
 Stripes  CC BY-SA 3.0

A seamless light gray paper texture with horizontal double lines.

Source V. Hartikainen

"Light Green Wall", Repeatable Texture #1190
 Concrete  CC BY-SA 3.0

Here's a repeatable texture that resembles a light green concrete wall or something similar.

Source V. Hartikainen

Noise Lines #897
 Paper  CC BY-SA 3.0

Lovely pattern with some good-looking non-random noise lines.

Source Zucx