This one is amazing, truly original. Go use it!
Source Viahorizon
A seamless pattern formed from background pattern 102
Source Firkin
A seamless web background with texture of aged grid paper.
Source V. Hartikainen
A seamless chequerboard pattern formed from a tile that can be had in Inkscape by selecting the rectangle and using shift+alt+i. Alternative colour scheme.
Source Firkin
Super dark, crisp and detailed. And a Kill Bill reference.
Source Badhon Ebrahim
This is the remix of an OCAL clipart called "Art Nouveau ornament" uploaded by "microcosme".Thanks.This is a seamless pattern of an Art Nouveau ornament.
Source Yamachem
Remixed from an image that was uploaded to Pixabay by Pixeline
Source Firkin
Prismatic Basic Pattern 2 No Background
Source GDJ
A simple bump filter made upon request at irc #inkscape at freenode. Made a screen capture of the making here: https://youtu.be/TGAWYKVLxQw
Source Lazur URH
There are quite a few grid patterns, but this one is a super tiny grid with some dust for good measure.
Source Dominik Kiss
Dark, crisp and subtle. Tiny black lines on top of some noise.
Source Wilmotte Bastien
Pattern #100! A black classic knit-looking pattern.
Source Factorio.us Collective
Remixed from a design seen in 'Burghley. The Life of William Cecil', William Charlton, 1857.
Source Firkin
New paper pattern with a slightly organic feel to it, using some thin threads.
Source Atle Mo
Could be paper, could be a Polaroid frame – up to you!
Source Chaos
I guess this is inspired by the city of Ravenna in Italy and its stone walls.
Source Sentel
The tile this is based on can be retrieved by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
The first pattern on here using opacity. Try it on a site with a colored background, or even using mixed colors.
Source Nathan Spady
Remixed from a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
Sometimes simple really is what you need, and this could fit you well.
Source Factorio.us Collective
Formed by heavily distorting part of a an image of a fish uploaded to Pixabay by GLady
Source Firkin
White circles connecting on a light gray background.
Source Mark Collins