Dark Sharp Edges #1320
Dark CC BY-SA 3.0Some dark 45 degree angles creating a nice pattern. Huge.
Source Dark Sharp Edges
More Textures
Wavy background #2023
Pink CC 0CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
Background pattern 202 (colour 2) #2489
Green 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
pinetree leaves seamless pattern #2517
Colorful CC 0The image depicts a seamless pattern of pine tree leaves.
Source Yamachem
Psychedelic #745
Gray CC BY-SA 3.0Geometric triangles seem to be quite hot these days.
Source Pixeden
Carbon Fiber v2 #105
Carbon CC BY-SA 3.0One more updated pattern. Not really carbon fiber, but it’s the most popular pattern, so I’ll give you an extra choice.
Source Atle Mo
Floral design 71 #2429
Dark CC 0From a drawing in 'From Snowdon to the Sea. Striking stories of North and South Wales', Marie Trevelyan, 1895.
Source Firkin
Wet Paper Background (Pale Yellow) #1224
Yellow CC BY-SA 3.0A seamless paper background colored in pale yellow.
Source V. Hartikainen
Prismatic Curved Diamond Pattern 3 No Background #162
Diamond CC 0Prismatic Curved Diamond Pattern 3 No Background
Source GDJ
Stucco@2X #295
Wall CC BY-SA 3.0A nice and simple gray stucco material. Great on its own, or as a base for a new pattern.
Source Bartosz Kaszubowski
Prismatic Curved Diamond Pattern 5 No Background #543
Diamond CC 0Prismatic Curved Diamond Pattern 5 No Background
Source GDJ
Arches #715
Light CC BY-SA 3.0One more in the line of patterns inspired by Japanese/Asian styles. Smooth.
Source Kim Ruddock
Cream Pixels@2X #1145
Light CC BY-SA 3.0If you don’t like cream and pixels, you’re in the wrong place.
Source Mizanur Rahman