Colourful background achieved with gradient fills.
Source Firkin
A frame using leaves from an image that was uploaded to Pixabay by mayapujiati
Source Firkin
Remixed from a drawing in 'Prehistoric Man: researches into the origin of civilisation in the old and the new world', Daniel Wilson, 1876.
Source Firkin
Prismatic Groovy Concentric Background 4
Source GDJ
A slightly grainy paper pattern with small horizontal and vertical strokes.
Source Atle Mo
Everyone loves a diamond, right? Make your site sparkle.
Source AJ Troxell
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
As simple and subtle as it gets. But sometimes that’s just what you want.
Source Designova
From a tile that can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
A bit simplified version. Although it could be edited out to be simpler. Anyway, this time the tiling is converted to a pattern fill -which is using clipping for the tile's edges.
Source Lazur URH
This is the third pattern called Dark Denim, but hey, we all love them!
Source Brandon Jacoby
This is the remix of "polka dot seamless pattern".The image depicts polka dot seamless pattern.
Source Yamachem
This one needs to be used in small areas; you can see it repeat.
Source Luca
Three shades of gray makes this pattern look like a small carbon fiber surface. Great readability even for small fonts.
Source Atle Mo
Prismatic Curved Diamond Pattern 6 No Background
Source GDJ
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Zero CC tileable dry grass texture, photographed and made by me. CC0
Source Sojan Janso
ZeroCC tileabel stone granite texture, edited from pixabay. CC0
Source Sojan Janso
A playful triangle pattern with different shades of gray.
Source Dimitrie Hoekstra
This is a hot one. Small, sharp and unique.
Source GraphicsWall
A pattern formed from a squared tile. The tile can be accessed in Inkscape by selecting the rectangle and using shift-alt-i.
Source Firkin