Triangular@2X #1157
Gray CC BY-SA 3.0Dare I call this a «flat pattern»? Probably not.
Source Dax Kieran
More Textures
Psychedelic #745
Gray CC BY-SA 3.0Geometric triangles seem to be quite hot these days.
Source Pixeden
Background pattern 215 #2371
Brown CC 0A grid of squares with green colours. Since the colours are randomly distributed it is automatically seamless.
Source Firkin
Grunge Wall #81
Wall CC BY-SA 3.0Light gray grunge wall with a nice texture overlay.
Source Adam Anlauf
White Sand@2X #20
Light CC BY-SA 3.0Same as gray sand but lighter. A sandy pattern with small light dots, and some angled strokes.
Source Atle Mo
Background pattern 117@2X #525
Noise CC 0A seamless pattern drawn originally in Paint.net by distorting a slice of background pattern 116 and copying the resulting triangle numerous times.
Source Firkin
Tree and bird pattern #1982
Green CC 0From a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
Carbon Fiber Big #326
Carbon CC BY-SA 3.0Bigger is better, right? So here you have some large carbon fiber.
Source Factorio.us Collective
Subtle Freckles@2X #90
Light CC BY-SA 3.0This is so subtle: We’re talking 1% opacity. Get your squint on!
Source Atle Mo
Grey Sandbag #641
Paper CC BY-SA 3.0A bit strange this one, but nice at the same time.
Source Diogo Silva
Floral background 21 #1785
Dark CC 0From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
White Wall 3 #1148
Wall CC BY-SA 3.0This one needs to be used in small areas; you can see it repeat.
Source Luca
Diagonal Waves@2X #1007
Gray CC BY-SA 3.0It has waves, so make sure you don’t get sea sickness.
Source CoolPatterns
60º lines@2X #26
Light CC BY-SA 3.0Never out of fashion and so much hotter than the 45º everyone knows, here is a sweet 60º line pattern.
Source Atle Mo
Little Triangles@2X #688
Light CC BY-SA 3.0The basic shapes never get old. Simple triangle pattern.
Source Atle Mo
Prismatic Curved Diamond Pattern 8 No Background@2X #550
Dark CC 0Prismatic Curved Diamond Pattern 8 No Background
Source GDJ
Prismatic Groovy Concentric Background 4 No Black #463
Noise CC 0Prismatic Groovy Concentric Background 4 No Black
Source GDJ
Disks pattern #1890
Dark CC 0Remixed from a drawing that was uploaded to Pixabay by DavidZydd
Source Firkin
Red Gemstone Tiles #1223
Red CC BY-SA 3.0This tiled background comes in red and consists of tiles that look like gemstones. It is more for blogs or social profiles, I think.
Source V. Hartikainen
Background pattern 202 #2491
Brown CC 0Based on several public domain drawings on Wikimedia Commons. This was formed from a rectangular tile. The tile can be accessed in Inkscape by selecting the rectangle 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
Light Honeycomb #59
Light CC BY-SA 3.0Light honeycomb pattern made up of the classic hexagon shape.
Source Federica Pelzel
"Black Metal Grid", Seamless Background Pattern #1080
Metal CC BY-SA 3.0A free seamless background pattern for use on websites.
Source V. Hartikainen
Decorative divider 185 #2588
Orange CC 0From a drawing in 'Artists and Arabs', Henry Blackburn, 1868.
Source Firkin
Background pattern 4 #223
Noise CC 0A pattern derived from repeating unit cells each derived from part of a mosaic in paint.net. The starting point for the mosaic was a picture of some prawns!
Source Firkin
Old Moon@2X #1202
Gray CC BY-SA 3.0Awesome name, great pattern. Who does not love space?
Source Nick Batchelor
honeycomb-regular hexagon #2540
Grid CC 0This is a seamless pattern of regular hexagon which has a honeycomb structure.
Source Yamachem
Abstract Ellipses Background Grayscale #378
Dark CC 0Abstract Ellipses Background Grayscale
Source GDJ