Not even 1kb, but very stylish. Gray thin lines.
Source Struck Axiom
Prismatic Rounded Squares Grid 3 No Background
Source GDJ
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
Prismatic Polka Dots Mark II No Background
Source GDJ
I guess this one is inspired by an office. A dark office.
Source Andrés Rigo.
Basket Fibers, Basket Texture, Braid Background style CC0 texture.
Source 1A-Photoshop
If you like it a bit trippy, this wave pattern might be for you.
Source Ian Soper
Subtle scratches on a light gray background.
Source Andrey Ovcharov
A repeating background of beige (or is it more vanilla yellow) textured stripes. One more background with stripes.
Source V. Hartikainen
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
This pack of filters can help you adding a blocky overlay to objects. May come handy at drawing blocks of stone.
Source Lazur URH
Clover with background for St. Patrick's Day. Add to a card with a doily, ribbon, a leprechaun or other embellishments.
Source BAJ
Pixel by pixel, sharp and clean. Very light pattern with clear lines.
Source M.Ashok
A hint of orange color, and some crossed and embossed lines.
Source Adam Anlauf
This one looks like a cork panel. Feel free to use it as a tiled background on your blog or website.
Source V. Hartikainen
You could get a bit dizzy from this one, but it might come in handy.
Source Dertig Media
A seamless texture of worn out "cardboard".
Source V. Hartikainen
The tile this fill pattern is based on can be had by using shift+alt+i on the rectangle.
Source Firkin
The unit cell for this seamless pattern can be had in Inkscape by selecting the rectangle and using shift+alt+i.
Source Firkin
Light and tiny, just the way you like it.
Source Rohit Arun Rao
A very dark spotted twinkle pattern for your twinkle needs.
Source Badhon Ebrahim
A seamless pattern formed from a rectangular tile. The tile can be retrieved by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
The rectangular tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin