Textured Red Brown Plastic #878
Wood CC BY-SA 3.0Textured Red Brown Plastic, Free Background Pattern. Although there's already enough plastic in our lives, let's bring it to the web too.)
Source V. Hartikainen
More Textures
Background pattern 225 (colour 6) #2322
Brown CC 0Seamless pattern formed from a tile that can be extracted by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
Seamless Prismatic Geometric Pattern With Background #264
Dark CC 0Seamless Prismatic Geometric Pattern With Background
Source GDJ
White Wave@2X #682
Stripes CC BY-SA 3.0Light and tiny, just the way you like it.
Source Rohit Arun Rao
Leafy decorative divider #1760
Dark CC 0From a drawing in 'At home', J. Sowerby, J. Crane and T. Frederick, 1881.
Source Firkin
Rough Concrete Surface #1195
Concrete CC BY-SA 3.0This one resembles a black concrete wall when is tiled. It should look great, at least with dark website themes.
Source V. Hartikainen
Decorative divider 207 #2367
Dark CC 0Derived from elements found in a floral ornament drawing on Pixabay.
Source Firkin
Fabric pattern (colour 6) #2397
Fabric CC 0Alternative colour scheme. Not a pattern for fabrics, but one produced from a jpg of a stack of fabric items that was posted on Pixabay. The tile that this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
P5 #1113
Light CC BY-SA 3.0Number five from the same submitter, makes my job easy.
Source Dima Shiper
Background pattern 8 (greyscale) #210
Dark CC 0Greyscale version of a pattern that came out of playing with the 'light rays' plug-in for Paint.net
Source Firkin
Geometric pattern #2002
Dark CC 0A monochrome pattern from a tile that can be had by selecting the rectangle in Inkscaope and using shift+alt+i
Source Firkin
Background pattern 306 (colour 6) #1878
Colorful CC 0Seamless pattern the tile for which can be had by using shift-alt-I on the selected rectangle in Inkscape.
Source Firkin
Absurdity #825
Light CC BY-SA 3.0Bit of a strange name on this one, but still nice. Tiny gray square things.
Source Carlos Valdez
Prismatic Rounded Squares Grid 4 No Background #491
Noise CC 0Prismatic Rounded Squares Grid 4 No Background
Source GDJ
Background pattern 313 #1858
Dark CC 0Background pattern originally a PNG drawn in Paint.net
Source Firkin
Diamond pattern 2 #2268
Red CC 0From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Debut Dark@2X #1015
Dark CC BY-SA 3.0Same classic 45-degree pattern, dark version.
Source Luke McDonald
Wavy Green Vertical Stripes #936
Stripes CC BY-SA 3.0A background pattern with wavy green vertical stripes. This one has green stripes on a white background. Download if you like it.
Source V. Hartikainen
Diamonds Are Forever@2X #184
Diamond CC BY-SA 3.0Sharp diamond pattern. A small 24x18px tile.
Source Tom Neal
Black Scales #191
Dark CC BY-SA 3.0Same as Silver Scales, but in black. Turn your site into a dragon with this great scale pattern.
Source Alex Parker
Prismatic Groovy Concentric Background@2X #450
Noise CC 0Prismatic Groovy Concentric Background
Source GDJ
Inflicted@2X #118
Grid CC BY-SA 3.0Dark squares with some virus-looking dots in the grid.
Source Hugo Loning