A grid of squares with green colours. Since the colours are randomly distributed it is automatically seamless.
Source Firkin
Three shades of gray makes this pattern look like a small carbon fiber surface. Great readability even for small fonts.
Source Atle Mo
This one takes you back to math class. Classic mathematic board underlay.
Source Josh Green
Floral patterns might not be the hottest thing right now, but you never know when you need it!
Source Lauren
Prismatic Geometric Pattern Variation 2 With Background
Source GDJ
Sharp diamond pattern. A small 24x18px tile.
Source Tom Neal
The rectangular tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
The Grid. A digital frontier. I tried to picture clusters of information as they traveled through the computer.
Source Haris Šumić
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
A free green background pattern with a pattern of rhombuses on a seamless texture. Feel free to use it as a tiled background image on your web site.
Source V. Hartikainen
This was formed by distorting an image of a background on Pixabay.
Source Firkin
Inspired by a pattern found in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.
Source Firkin
Prismatic Snowflakes Pattern No Background
Source GDJ
Number 4 in a series of 5 beautiful patterns. Can be found in colors on the submitter’s website.
Source Janos Koos
Vector version of a png that was uploaded to Pixabay by pencilparker
Source Firkin
A seamless pattern formed from a square tile. The tile can be retrieved by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
Colour version of the original pattern.
Source Firkin
8 by 8 pixels, and just what the title says.
Source pixilated
A large pattern with funky shapes and form. An original. Sort of origami-ish.
Source Luuk van Baars
Could be paper, could be a Polaroid frame – up to you!
Source Chaos