Background pattern 15 #201
Dark CC 0A seamless pattern the starting point for which was a 'colour modulo' texture in Paint.net.
Source Firkin
More Textures
Dark Wall@2X #818
Dark CC BY-SA 3.0Just to prove my point, here is a slightly modified dark version.
Source Atle Mo
Blue & Dark Well #1703
Wall CC 0Background Wall, Art Abstract, Blue Well & CC0 texture.
Source Ractapopulous
Grey Washed Wall #1128
Wall CC BY-SA 3.0This is a semi-dark pattern, sort of linen-y.
Source Sagive SEO
Prismatic Polka Dots Mark II No Background #530
Noise CC 0Prismatic Polka Dots Mark II No Background
Source GDJ
Colourful bricks pattern (no background) #265
Noise CC 0Original minus the background
Source Firkin
Wavy background #2020
Green CC 0CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
Wood Web Background #870
Wood CC BY-SA 3.0Here's a tile-able wood background image for use in web design.
Source V. Hartikainen
"Dark Red Canvas", Seamless Web Texture@2X #1222
Red CC BY-SA 3.0A free seamless background image with a texture of dark red "canvas". It should look very nice on web sites.
Source V. Hartikainen
Brick Wall@2X #1147
Wall CC BY-SA 3.0One more brick pattern. A bit more depth to this one.
Source Benjamin Ward
"Glossy Pink Fur", Pink Background Pattern #1235
Pink CC BY-SA 3.0Here's a quite bright pink background pattern for use on websites. It doesn't look like a real fur, but it definitely resembles one.
Source V. Hartikainen
Prismatic Abstract Line Art Pattern Background@2X #566
Dark CC 0Prismatic Abstract Line Art Pattern Background
Source GDJ
Abstract Arbitrary Geometric Background #497
Noise CC 0Abstract Arbitrary Geometric Background derived from an image on Pixabay.
Source GDJ
Grunge Wall #81
Wall CC BY-SA 3.0Light gray grunge wall with a nice texture overlay.
Source Adam Anlauf
Tex2res4@2X #718
Dark CC BY-SA 3.0Number 1 in a series of 5 beautiful patterns. Can be found in colors on the submitter’s website.
Source Janos Koos
Connected@2X #349
Light CC BY-SA 3.0White circles connecting on a light gray background.
Source Mark Collins
Background pattern 41 #262
Fabric CC 0A seamless pattern the starting point for which was a 'light rays' rendering in Paint.net.
Source Firkin
Floral design 97 #1778
Yellow CC 0From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
Redox 02@2X #852
Light CC BY-SA 3.0After 1 comes 2, same but different. You get the idea.
Source Hendrik Lammers
Rice Wall #1255
Wall CC 0Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
geometrical pattern 01 remix #2456
Wall CC 0This is a remix of "geometrical pattern 01".
Source Yamachem
Floral background #1973
Dark CC 0Remixed from a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
Background pattern 246 #2186
Red CC 0This was formed by distorting an image of a background on Pixabay.
Source Firkin
Grid@2X #975
Gray CC BY-SA 3.0There are quite a few grid patterns, but this one is a super tiny grid with some dust for good measure.
Source Dominik Kiss
Decorative divider 288 #1820
Dark CC 0From a drawing in 'Navigations de Alouys de Cademoste.-La Navigation du Capitaine Pierre Sintre', Alvise da ca da Mosto, 1895.
Source Firkin
Background pattern 223 (colour 3) #2351
Green CC 0Seamless pattern formed from a tile that can be had by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin