As far as fabric patterns goes, this is quite crisp.
Source Heliodor Jalba
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
Not a flat you live inside, like in the UK – but a flat piece of cardboard.
Source Appleshadow
This is a hot one. Small, sharp and unique.
Source GraphicsWall
The image is a seamless pattern which is derived from a vine .Consequently, the vine got like dots via vectorization.The original vine is here:jp.pinterest.com/pin/500744052301410188/
Source Yamachem
Remixed from a PNG that was uploaded to Pixabay by k_jprather
Source Firkin
This could be a hippy vintage wallpaper.
Source Tileable Patterns
A blue background wallpaper for websites. It has a seamless texture with vertical stripes. It looks quite nice not only when using as a tiled background on websites, but also on computer desktops.
Source V. Hartikainen
Don’t look at this one too long if you’re high on something.
Source Luuk van Baars
The image depicts a seamless pattern made using a bird's face.
Source Yamachem
A seamless pattern formed from a sports car on clker.com. To get the tile, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
A seamless pattern formed from background pattern 102
Source Firkin
This ladies and gentlemen, is texturetastic! Love it.
Source Adam Pickering
Element of beach pattern with background.
Source Rones
It was called Navy Blue, but I made it dark. You know, the way I like it.
Source Ethan Hamilton
A monochrome pattern from a tile that can be had by selecting the rectangle in Inkscaope and using shift+alt+i
Source Firkin
Like the name suggests, this background image consists of a pattern of dark bricks. It may be an option for you, if you are looking for something that looks like a brick wall for use as a background on web pages. It's not a masterpiece, but looks pretty nice when is tiled.
Source V. Hartikainen
Dark squares with some virus-looking dots in the grid.
Source Hugo Loning
Formed from a tile based on a drawing from 'Viaggi d'un artista nell'America Meridionale', Guido Boggiani, 1895.
Source Firkin
Wasn't satisfied with the original's colouring. Too much component transfer and colormatrixes yet the results are lacking a bit. So this time it is a simple black to transparent fade, making it possible remixing easily once there will be other blending modes supported as well. Probably in inkscape 0.92.
Source Lazur URH