Stone Wall & Green #1483
 Stone  CC 0

Incoming catena. Stone & well. CC0 texture.

Source Unknow

 More Textures
Back [email protected] #946
 Light  CC BY-SA 3.0

Pixel by pixel, sharp and clean. Very light pattern with clear lines.

Source M.Ashok

Light [email protected] #60
 Light  CC BY-SA 3.0

Light honeycomb pattern made up of the classic hexagon shape.

Source Federica Pelzel

Abstract Ellipses Background Grayscale #378
 Dark  CC 0

Abstract Ellipses Background Grayscale

Source GDJ

Background pattern 228 #2308
 Colorful  CC 0

Non-seamless pattern drawn in Paint.net and vectorised in Vector Magic.

Source Firkin

Real Carbon Fiber #286
 Carbon  CC BY-SA 3.0

Carbon fiber is never out of fashion, so here is one more style for you.

Source Alfred Lee

Use Your Illusion #917
 Dark  CC BY-SA 3.0

A dark one with geometric shapes and dotted lines.

Source Mohawk Studios

Prismatic Isometric Cube Wireframe Pattern No [email protected] #500
 Light  CC 0

Prismatic Isometric Cube Wireframe Pattern No Background

Source GDJ

Tree and bird pattern #1982
 Green  CC 0

From a drawing in 'Line and form', Walter Crane, 1914.

Source Firkin

Textured Orange Stripe Pattern #997
 Stripes  CC BY-SA 3.0

A textured orange background pattern with vertical stripes.

Source V. Hartikainen

Square ornament 37 (colour) #2176
 Colorful  CC 0

Remixed from a drawing in 'Paul's Sister', Frances Peard, 1889.

Source Firkin

Leafy pattern 7 (colour) #1827
 Red  CC 0

Alternative colour scheme.

Source Firkin

Prismatic Dots Background 3 #505
 Noise  CC 0

Prismatic Dots Background 3

Source GDJ

Background pattern 263 #2073
 Pink  CC 0

Actually remixed from a pattern on Pixabay. But then noticed a very similar one on Openclipart.org uploaded by btj51q2.

Source Firkin

Floral Pattern Background 3 #218
 Noise  CC 0

PDP

Source GDJ

Project [email protected] #120
 Paper  CC BY-SA 3.0

Light square grid pattern, great for a “DIY projects” sort of website, maybe?

Source Rafael Almeida

Background pattern 104 #561
 Dark  CC 0

Background pattern 104

Source Firkin

[email protected] #1157
 Gray  CC BY-SA 3.0

Dare I call this a «flat pattern»? Probably not.

Source Dax Kieran

Brick #1373
 Wall  CC 0

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

Source Linolafett

Cork 1 #2108
 Unknow  CC 0

CC0 textures, backgrounds.

Source SliverKnight

Grid [email protected] #606
 Grid  CC BY-SA 3.0

Nice little grid. Would work great as a base on top of some other patterns.

Source Arno Gregorian

Pattern cleanup filtered 2 #152
 Noise  CC 0

Cleanup with gradients and filtering.

Source Lazur URH

Cork Floor #1281
 Yellow  CC 0

Zero CC tileable cork floor, photographed and made by me. CC0

Source Sojan Janso

Repeating Vintage Paper Background #1077
 Paper  CC BY-SA 3.0

A repeating background of beige paper with vintage look. Repeats to infinity, as usual.

Source V. Hartikainen