Hexagonal pattern #2379
Dark CC 0A seamless pattern formed from a tile that can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
More Textures
Batthern #324
Grid CC BY-SA 3.0Sometimes simple really is what you need, and this could fit you well.
Source Factorio.us Collective
Floral background 17 (colour 2) #1850
Orange CC 0Remixed from a JPG that was uploaded to Pixabay by theasad121
Source Firkin
Decorative divider 285 #1847
Dark CC 0From a drawing in 'In an Enchanted Island', William Mallock, 1892.
Source Firkin
pinetree leaves seamless pattern #2517
Colorful CC 0The image depicts a seamless pattern of pine tree leaves.
Source Yamachem
Mugs pattern #2479
Colorful CC 0A seamless pattern formed from miutopia mug remixes on a tablecloth.
Source Firkin
Redox 02 #851
Light CC BY-SA 3.0After 1 comes 2, same but different. You get the idea.
Source Hendrik Lammers
Background pattern 1 #220
Noise CC 0A pattern derived from repeating unit cells each derived from part of a fractal rendering in paint.net.
Source Firkin
Prismatic Groovy Concentric Background 3 No Black #459
Noise CC 0Prismatic Groovy Concentric Background 3 No Black
Source GDJ
Prismatic Basic Pattern 2 No Background@2X #448
Noise CC 0Prismatic Basic Pattern 2 No Background
Source GDJ
Snowflake remix #155
Dark CC 0A 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
Background pattern 246 (colour 3) #2184
Green CC 0This was formed by distorting an image of a background on Pixabay.
Source Firkin
Asfalt #927
Dark CC BY-SA 3.0A very dark asfalt pattern based off of a photo taken with my iPhone.
Source Atle Mo
Decorative divider 291 #1793
Dark CC 0From a drawing in 'Real Sailor-Songs', John Ashton, 1891.
Source Firkin