A simple example on using clones. You can generate a nice base for a pattern fill quickly with it.
Source Lazur URH
This one is rather fun and playful. The 2X could be used at 1X too!
Source Welsley
Remixed from an image on Pixabay, the original having been uploaded by darkmoon1968.
Source Firkin
Geometric lines are always hot, and this pattern is no exception.
Source Listvetra
Vertical lines with a bumpy, yet crisp, feel to it.
Source Raasa
Stefan is hard at work, this time with a funky pattern of squares.
Source Stefan Aleksić
Remixed from a drawing in 'A Girl in Ten Thousand', Elizabeth Meade, 1896.
Source Firkin
A repeating background with a look of paper. I have added some changes to PatCreator. Now you can share your designs by submitting them to a new gallery section. Start by clicking Edit with PatCreator above.
Source V. Hartikainen
A very slick dark rubber grip pattern, sort of like the grip on a camera.
Source Sinisha
Prismatic Geometric Pattern Variation 2 With Background
Source GDJ
This one takes you back to math class. Classic mathematic board underlay.
Source Josh Green
A seamless pattern formed from background pattern 102
Source Firkin
Prismatic Snowflakes Pattern 2 No Background
Source GDJ
I skipped number 3, because it wasn’t all that great. Sorry.
Source Dima Shiper
Remixed from a design seen on Pixabay. The basic tile can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
Zero CC tileable ground (#2) cracked, crackled texture, made by me. CC0
Source Sojan Janso
Thin lines, noise and texture creates this crisp dark denim pattern.
Source Marco Slooten
Remixed from a drawing that was uploaded to Pixabay by captenpub.
Source Firkin
Zero CC tileable cork floor, photographed and made by me. CC0
Source Sojan Janso
Background formed from the original with an emboss effect
Source GDJ
Inspired by a design found in 'Konstantinápolyi emlékeim', Miklos Chriszto, 1893.
Source Firkin
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin